Suomen ympäristökeskus: Recent submissions

Now showing items 1-20 of 5274
  • Paavola, Teija; Lehtoranta, Suvi; Luostarinen, Sari; Akujärvi, Anu; Grönroos, Juha (Suomen ympäristökeskus, 2019)
    Suomen ympäristökeskuksen raportteja 50/2019
    Sikatalouden kannattavuushaasteet ovat monin tavoin kehittäneet sianlihantuotantoa tehokkaammaksi, mikä osaltaan on sekä vähentänyt ympäristövaikutuksia että aiheuttanut uusia haasteita. Toisaalta yleiset ihmistoiminnan ympäristövaikutusten vähentämistavoitteet luovat tarpeen kehittää myös sianlihantuotantoa edelleen nykyistä kestävämmäksi. Yksikkökoon ja tuotannon tehokkuuden kasvu sekä tuotannon keskittyminen on aiheuttanut mm. myös lannan alueellista keskittymistä, jolloin sen kestävä hyödyntäminen tuotantokeskittymissä alkaa olla paikoin haasteellista, ja riski ympäristöhaittoihin kasvaa. Toisaalta ympäristöhaasteet myös jarruttavat sikatalouden kehittämistä ja kasvua. Tilanne on erityisen haastava Varsinais-Suomessa, jossa on yli 25 % Suomen sioista ja peltomaan fosforipitoisuudet ovat jo varsin korkeita. Hankkeen tavoitteena oli selvittää sianlihantuotannon mahdollisuuksia toimia nykyistä kestävämmällä tavalla huomioiden energiaomavaraisuus, ravinteiden kierrätys, ympäristövaikutusten minimointi sekä maan rakenteen parantaminen esim. viljelykiertoja ja kehittynyttä lannankäsittelyä hyödyntäen. Erilaisten tehostamistoimenpiteiden vaikutuksia ravinne- ja energiataseisiin, taloudelliseen kannattavuuteen sekä elinkaarisiin ympäristövaikutuksiin arvioitiin agri- ja nurmisymbiooseiksi määriteltyjen toimintamallien avulla. Tulosten perusteella symbioosimuotoiseen toimintaan siirtyminen vähentää sianlihantuotannon ilmaston lämpenemistä aiheuttavia päästöjä noin 35 – 50 % nykytilaan verrattuna riippuen biokaasun hyödyntämistavoista. Symbiooseilla voidaan vähentää myös rehevöittäviä päästöjä ja toimintatapa on tilan kannalta mielekäs sekä ravinne- että energiataseen kannalta. Toimintamalli ei myöskään aiheuta tilalle lisäkustannuksia nykytilaan verrattuna. Symbiooseissa kuitenkin tarvitaan nykytilaa enemmän typpiravinteita ja myös käytetään enemmän orgaanisia lannoitteita, jonka vuoksi ammoniakkipäästöt kasvavat nykytilaan verrattuna. Toimintamallilla saavutettavien hyötyjen täysimääräinen toteutuminen edellyttääkin koko toimintaketjun eri vaiheiden optimointia ja hyvää hallintaa. Nurmen lisääminen viljelykiertoon, lannan prosessointi biokaasulaitoksessa yhdessä kasviperäisten massojen kanssa sekä mädätteen erottaminen neste- ja kuivajakeeseen mahdollistavat tilan omassa kierrossa olevien ravinteiden tehokkaamman hyödyntämisen ja vähentävät fosforihuuhtoumaa nykytilaan verrattuna. Typpihävikkien minimoimiseksi ravinnetuotteet on varastoitava katetuissa varastoissa, nestejakeet levitettävä sijoittamalla ja kuivajakeet mullattava välittömästi levityksen jälkeen. Näillä toimilla hallitaan myös ammoniakkipäästöjä. Metaanipäästöjen vähentämiseksi lanta on käsiteltävä biokaasulaitoksessa tuoreena ilman välivarastointia ja viipymän kaasunkeräyksen piirissä on oltava riittävä. Mikäli biokaasusta jalostetaan liikennepolttoainetta, niin jalostusprosessin tulisi sisältää poistokaasujen polttimen. Nykytiedon valossa symbioosimuotoinen toiminta tarkastelussa käytetyillä oletuksilla ei vielä kääntänyt maaperän hiilen vähenemistä varastoitumiseksi. Maaperän hiilivaraston muutosnopeuteen vaikuttavista toimista tarvitaankin vielä lisää tutkimustietoa. Mallinnuksen perusteella voidaan kuitenkin vahvistaa, että orgaanisella lannoitteella voidaan lisätä pitkään mineraalilannoitteilla viljellyn peltomaan hiilen määrää, ja että symbioosimuotoinen toiminta vähensi hiilipäästöjä kokonaisuutta tarkasteltaessa nykytilaan verrattuna. Maaperän rakennetta parantaa myös kevyempi lannan levityskalusto, mikä voi pitkällä aikavälillä nostaa satotasoja ja vähentää edelleen osaltaan ravinteiden huuhtoutumista.
  • Vilmi, A.; Zhao, W.; Picazo, F.; Li, M.; Heino, J.; Soininen, J.; Wang, J. (2019)
    Science of the Total Environment 702: 134974
    Understanding the role of climatic variation on biodiversity is of chief importance due to the ongoing biodiversity loss and climate change. Freshwaters, one of the most threatened ecosystems in the world, offer a valuable context to study biodiversity patterns of distinct organism groups in relation to climatic variation. In the Tibetan Plateau biodiversity hotspot - Hengduan Mountain region, we studied the effects of climate and local physico-chemical factors on stream microorganisms (i.e. bacteria) and macroorganisms (i.e. macroinvertebrates) in two parallel catchments with contrasting precipitation and temperature, that is, the Nujiang and Lancang Rivers. Diversities and community structures were better explained by climatic and local environmental variables in the drier and colder catchment and at higher elevations, than in the warmer and wetter conditions and at lower elevations. This suggests that communities may be more strongly assembled by deterministic processes in the former, comparatively harsher conditions, compared to the latter, more benign conditions. Macroinvertebrates were more strongly affected by climatic and local environmental factors compared to bacteria, but the diversities and community structures of the two groups showed spatially similar responses to overall abiotic variation, being especially evident with their community structures' responses to climate. Furthermore, bacterial and macroinvertebrate diversities were positively correlated in the drier and colder catchment, implying that these biologically and ecologically distinct organism groups are likely to be driven by similar processes in areas with such climatic conditions. We conclude that changes in climatic and local environmental conditions may affect the diversity of macroorganisms more strongly than that of microorganisms, at least in subtropical mountainous stream ecosystems studied here, but simultaneous responses of both groups to environmental changes can also be expected.
  • Vilmi, Annika; Karjalainen, Satu M.; Wang, Jianjun; Heino, Jani (2019)
    Journal of Biogeography 46 (7): 1419-1428
    Aim To discover how biological traits, ecological preferences and taxonomic relatedness are associated with occupancy and abundance of diatom species across lakes and streams. Location Finland. Taxon Diatoms. Methods We studied 288 diatom species from 492 stream sites and 230 diatom species from 290 lake sites. For each species, we calculated logit-transformed regional occupancy and log-transformed mean local abundance, and further determined biological traits, ecological preferences and taxonomic levels for each species. Boosted regression tree (BRT) analysis was used to reveal the linear and nonlinear associations of biological, ecological and taxonomic predictors with occupancy or abundance of lake and stream diatoms. Results There were strong and positive interspecific occupancy–abundance relationships across both lakes and streams. The BRT models explained more deviances in variation in occupancy and abundance and their relationship for lakes than streams. Biological traits, especially cell size, but also life-form and guild, were the strongest predictors of diatom occupancy and abundance in lakes and streams when controlling for ecological preferences and taxonomic relatedness. Main conclusions In general, biological traits were the strongest predictors of occupancy and abundance in both freshwater systems. Species with similar biological traits thus tended to show similar occupancies and abundances. As indicated by lower explained deviances, occupancy and abundance in streams seemed to be more complexly structured than in lakes, suggesting that these two freshwater system types differ in the formation of biodiversity patterns. This difference may be related to the differences in hydrological connectedness between lakes and streams. Understanding how variations in species’ occupancy and abundance are formed across various waterbodies is important for meaningful biodiversity conservation.
  • Rehunen, Antti; Strandell, Anna; Oinonen, Kari; Malmi, Päivi; Vesanen, Sampo; Peltola, Anna (Suomen ympäristökeskus, 2019)
    Suomen ympäristökeskuksen raportteja 51/2019
    Tässä raportissa on laadittu ehdotus maakuntatason indikaattoreista, jotka kuvaavat kattavasti alueidenkäyttöä ja kulttuuriympäristön hoitoa. Indikaattoreiden avulla voidaan seurata kehitystä maakuntien alueella ja arvioida asetettujen tavoitteiden tuloksellisuutta. Indikaattoreita voidaan hyödyntää esimerkiksi ministeriöiden keskusteluissa maakuntien liittojen ja elinkeino-, liikenne ja ympäristö (ELY) -keskusten kanssa. Mittariston kehittämisen taustalla oli alun perin maakuntauudistuksen valmistelu sekä uudistuksessa perustettaville maakunnille kaavaillut tehtävät. Uudistuksen jäätyä toteutumatta mittaristoa voidaan käyttää myös ELY-keskusten ja maakuntien liittojen toiminnan kehittämisessä. Mittariston kohteena on koko maakunnan alueidenkäyttö, käsittäen sekä kaupunki- että maaseutualueet. Osa mittareista kohdistuu vain taajamiin tai kaupunkiseuduille, osa painottuu haja-asutusalueen tarkasteluun. Alueidenkäytön kysymyksinä tarkastellaan alue- ja yhdyskuntarakennetta, maankäyttöä, infrastruktuuria sekä viherrakennetta ja luonnonvarojen käyttöä. Kulttuuriympäristön kysymyksinä tarkastellaan rakennusperinnön ja kulttuurimaiseman säilymistä ja kestävää käyttöä. Mittareita on kehitetty vuorovaikutuksessa ELY-keskusten ja maakuntien liittojen kanssa. Mittareiden pohjana on käytetty jo olemassa olevia indikaattoreita, mutta raportissa ehdotetaan myös uusien indikaattoreiden kehittämistä. Mittareiden lähtötietoina käytetään valtakunnallisia tilasto- ja rekisteriaineistoja. Pääosa tietolähteistä on paikkatietomuotoisia. Mittarit lasketaan lähtökohtaisesti koko maakunnan tasolla, mutta niitä on mahdollista tarkastella myös tarkemmin kunta- tai taajamatasolla. Alueidenkäytön ja kulttuuriympäristön ehdotetut mittarit on koottu seitsemän aihepiirin alle. Teemoja ovat: rakentaminen ja infrastruktuuri, taajamien maankäyttö ja asutus, arkimatkat ja saavutettavuus, kaupunkiseutujen yhdyskuntarakenne, ilmastonmuutos alueidenkäytössä, kulttuuriympäristö sekä luonnonympäristö ja luonnonvarojen kestävä käyttö. Jokainen teema sisältää muutaman avainindikaattorin, joita ehdotetaan seurattavaksi säännöllisesti. Avainindikaattoreista esitetään kuvaus, perustelut indikaattorin valinnalle, laskentamenetelmät, tulosten tulkinnassa huomioon otettavia asioita sekä indikaattoriin liittyviä kehittämistarpeita. Avainindikaattoreiden lisäksi teemoissa esitellään suppeasti myös muita mittareita, joita voidaan hyödyntää ELY-keskuksissa ja maakuntien liitoissa. Avainindikaattoreita on yhteensä 21 ja muita mittareita 35. Avainindikaattoreiden joukosta on nostettu esille seitsemän kärki-indikaattoria, jotka kuvaavat alueidenkäytön keskeisimpiä ja ajankohtaisimpia kysymyksiä. Raportissa esitetään suunnitelma mittareiden käyttöönotolle ja raportoinnille. Avainindikaattoreiden osalta on arvioitu tietojen tuottamisen vaatimia resursseja ja tietojen päivitystaajuutta. Osa indikaattoreiden lähtötiedoista ja laskentamenetelmistä edellyttää kehitystyötä. Indikaattoritiedon tärkeimmäksi julkaisukanavaksi esitetään Suomen ympäristökeskuksen ylläpitämää Elinympäristön tietopalvelu Liiteriä. Lisäksi maakunnittaisia koosteita ehdotetaan koottavaksi erilliselle verkkosivulle. Tämän raportin kokoaminen on toteutettu ympäristöministeriön ja Suomen ympäristökeskuksen rahoittamassa hankkeessa Maakuntien alueidenkäytön ja kulttuuriympäristön mittarit.
  • Leivuori, Mirja; Hatanpää, Eliisa; Koivikko, Riitta; Tervonen, Keijo; Lanteri, Sari; Ilmakunnas, Markku (Finnish Environment Institute, 2019)
    Reports of the Finnish Environment Institute 48/2019
    Proftest SYKE arranged the proficiency test (PT) for the measurements of the gross and net calorific value, the content of ash, carbon, nitrogen, hydrogen, moisture, sulphur, and volatile matter in peat, wood pellet (not sulphur) and coal samples in August-September 2019. In total, there were 34 participants in the PT. The participants could also estimate the emission factor for the peat and coal samples. The robust mean or the median of the results reported by the participants was used as the assigned value for measurements. The performance evaluation was based on the z scores. In total, 90 % of the reported results were satisfactory, when the deviation of 1–30 % from the assigned value was accepted. For the gross calorific value measurements 93 % of the peat sample results, 76 % of the wood pellet sample results, and 86 % of the coal sample results were satisfactory. For the net calorific value measurements 82 % of the peat sample results, 88 % of the wood pellet results, and 93 % of the coal sample results were satisfactory. The performance evaluation was not done for the measurements of Mad in all samples, Nd in the wood pellet sample, and emission factor in peat and coal sample. Warm thanks to all the participants in this proficiency test!
  • Malila, Riikka; Viskari, Eeva-Liisa; Kallio, Johanna (Suomen ympäristökeskus, 2019)
    Suomen ympäristökeskuksen raportteja 49/2019
    MORTTI -hankkeessa (Mobiili ravinteiden talteenotto kenttäolosuhteissa) selvitettiin ratkaisuja kenttäolosuhteissa syntyvien käymälätuotosten ravinteiden talteenottoon ja hyödyntämiseen. Virtsa ja uloste sisältävät paljon ravinteita ja niiden erottelu muista jätevesistä jo syntypaikalla mahdollistaa tehokkaan ravinteiden talteenoton ja hyötykäytön. Samalla säästetään käymäläjätevesien kalliissa kuljetuskustannuksissa jätevedenpuhdistamolle ja pienennetään kuljetuksista aiheutuvia päästöjä. Hankkeessa testattiin uudenlaisella virtsan käsittelytekniikalla varustettua kenttäkäymälää. Virtsan ja ulosteen käsittelymenetelmien kartoituksen tuloksena pilotoitavaksi virtsan käsittelymenetelmäksi valikoitui Ruotsin maataloustieteellisen yliopiston (SLU) kehittämä alkalinen haihdutusmenetelmä, jossa virtsa imeytettiin tuhka-kalkkiseokseen ja ylimääräinen neste haihdutettiin pois. Ulosteen käsittelyyn valittiin tavanomainen kompostointi. Hankkeen pilotointi toteutettiin Porin prikaatin (PORPR) harjoitusalueella Säkylässä. Kolmen kuukauden pilotointijakson aikana MORTTI -kenttäkäymälään rekisteröityi tuhatkunta käyttökertaa ja käymälässä käsiteltiin satoja litroja virtsaa. Virtsasta syntyi jauhemaista lopputuotetta, joka painoi alle kymmenesosan alkuperäiseen virtsaan verrattuna. Etenkin virtsan sisältämä typpi konsentroitui tehokkaasti lopputuotteeseen. Lopputuotteesta (tuhka-kalkkiseos, johon virtsa imeytettiin) analysoitiin yli 300 orgaanista haitta-ainetta, lääkeainetta ja hormonia, ja niistä löytyi seitsemän määritysrajan ylittävää pitoisuutta. Suurin yksittäinen löydös oli ibuprofeeni, jonka pitoisuus oli yhdessä näytteessä lähes 20 mg/kg ka. Kadmiumin pitoisuus sen sijaan oli jo pelkässä tuhkassa korkeampi, kuin mitä maa- ja puutarhataloudessa käytettäviin lannoitevalmisteisiin sallitaan. Jotta lopputuotetta voitaisiin käyttää lannoitevalmisteena maa- ja puutarhataloudessa, niin tuhka-kalkkiseoksessa käytettävä tuhka ei saisi ylittää lainsäädännön kadmium -raja-arvoa. Metsälannoituksessa raja-arvo on korkeampi, mutta virtsaa sisältävää tuhka-kalkkiseosta ei olisi mahdollista käyttää, koska orgaanisen aineksen käyttö metsälannoituksessa ei ole nykylainsäädännön mukaan sallittua. Säkylän käymäläpilotin lisäksi hankkeessa tutkittiin virtsan konsentrointia ultrasuodatus- ja käänteisosmoosilaitteistolla sekä ulosteen pyrolysointia laboratoriomittakaavassa. Kalvosuodatuksessa syntyi tilavuudeltaan noin kymmenesosaan konsentroitua virtsakonsentraattia, johon virtsan ravinteet, mutta myös suolat konsentroituivat. Pyrolyysikokeissa ulostejae saatiin onnistuneesti käsiteltyä biohiiltä muistuttavaksi jakeeksi. Sitran rahoittama hanke toteutettiin 1.9.2017 – 15.10.2019 Suomen ympäristökeskuksen (SYKE), Tampereen ammattikorkeakoulun (TAMK), Käymäläseura Huussi ry:n (KSH) ja Puolustushallinnon rakennuslaitoksen (PHRAKL) yhteistyönä. Hankkeessa oli tiiviisti mukana myös Puolustusvoimien logistiikkalaitos (PVLOGL) sekä SLU.
  • Niemistö, Johanna; Myllyviita, Tanja; Judl, Jáchym; Holma, Anne; Sironen, Susanna; Mattila, Tuomas; Antikainen, Riina; Leskinen, Pekka (2019)
    International Journal of Sustainable Development & World Ecology 26 (7): 625-634
    Small and medium-sized enterprises (SMEs) have a substantial role in the economy and job creation, but they are a remarkable source of environmental impacts. SMEs often lack skills and resources to compile environmental impact assessments; Streamlined Life Cycle Analysis (LCA) can provide efficient tools for this. An application of streamlined LCA relying heavily on database data, LCA clinic, was developed and tested on 23 SMEs in Finland. The climate change impacts were mainly caused by the production of raw materials, electricity and heating, whereas packaging and transportation were not influential. A significant amount of emissions were indirect, i.e. caused by production of raw materials. Thus, decreasing emissions from raw material production or selecting raw materials with a smaller environmental load could be a more efficient way to decrease emissions than reducing direct emissions such as those from electricity use. Lack of data in the LCA-databases was considered a challenge. An access to regionally customised datasets is important for the implementation of LCA clinics. Company feedback indicated that LCA clinics were useful in climate-friendly product design and increased environmental awareness, but did not lead to immediate actions to reduce emissions because of inadequate investment capabilities. Company managers had limited possibilities to use the results in marketing as comparative assessments would require a full LCA. Many company managers were willing to pay a fee sufficient to cover the costs of an LCA clinic, but some considered that the costs should be covered by external funding sources.
  • Äystö, Lauri; Vieno, Niina; Sikanen, Tiina; Karlsson, Sanja; Virtanen, Virpi (2019)
  • Myllyviita, Tanja; Sironen, Susanna; Saikku, Laura; Holma, Anne; Leskinen, Pekka; Palme, Ulrika (2019)
    Journal of Cleaner Production 236: 117641
    Impacts of bioeconomy on climate have been much discussed, but less attention has been given to biodiversity deterioration. One approach to assess biodiversity impacts is Life Cycle Assessment (LCA). Finland is a forested country with intensive forest industries, but only coarse biodiversity LCA methods are available. The aim of this study was to further develop and apply approaches to assess the biodiversity impacts of wood use in Finland. With the species richness approach (all taxons included), biodiversity impacts were higher in Southern than in Northern Finland but impacts in Southern and Northern Finland were lower when mammals, birds and molluscs were included. With the ecosystem indicators approach, if the reference situation were forest in its natural state, biodiversity impacts were higher than in the case where the initial state of forest before final felling was used to derive biodiversity loss. In both cases, the biodiversity impacts were higher in Northern Finland. These results were not coherent as the model applying species richness data assesses biodiversity loss based on all species, whereas the ecosystem indicators approach considers vulnerable species. One limitation of the species richness approach was that there were no reliable datasets available. In the ecosystem indicators approach, it was noticed that the biodiversity of managed Finnish forests is substantially lower than in natural forests. Biodiversity LCA approaches are highly sensitive to reference states, applied model and data. It is essential to develop approaches capable of comparing biodiversity impacts of forest management practices, or when looking at multiple environmental impacts simultaneously with the LCA framework.
  • Näkki, Pinja; Setälä, Outi; Lehtiniemi, Maiju (2019)
    Marine Pollution Bulletin 119 (1): 255-261
    Microplastics (MPs) are observed to be present on the seafloor ranging from coastal areas to deep seas. Because bioturbation alters the distribution of natural particles on inhabited soft bottoms, a mesocosm experiment with common benthic invertebrates was conducted to study their effect on the distribution of secondary MPs (different-sized pieces of fishing line < 1 mm). During the study period of three weeks, the benthic community increased MP concentration in the depth of 1.7-5.1 cm in the sediment. The experiment revealed a clear vertical gradient in MP distribution with their abundance being highest in the uppermost parts of the sediment and decreasing with depth. The Baltic clam Macoma balthica was the only study animal that ingested MPs. This study highlights the need to further examine the vertical distribution of MPs in natural sediments to reliably assess their abundance on the seafloor as well as their potential impacts on benthic communities.
  • Van Looy, Kris; Tonkin, Jonathan D.; Floury, Mathieu; Leigh, Catherine; Soininen, Janne; Larsen, Stefano; Heino, Jani; Poff, N. LeRoy; Delong, Michael; Jaehnig, Sonja C.; Datry, Thibault; Bonada, Nuria; Rosebery, Juliette; Jamoneau, Aurélien; Ormerod, Steve J.; Collier, Kevin J.; Wolter, Christian (2019)
    River Research and Applications 35 (2): 107-120
    Resilience in river ecosystems requires that organisms must persist in the face of highly dynamic hydrological and geomorphological variations. Disturbance events such as floods and droughts are postulated to shape life history traits that support resilience, but river management and conservation would benefit from greater understanding of the emergent effects in communities of river organisms. We unify current knowledge of taxonomic-, phylogenetic-, and trait-based aspects of river communities that might aid the identification and quantification of resilience mechanisms. Temporal variations in river productivity, physical connectivity, and environmental heterogeneity resulting from floods and droughts are highlighted as key characteristics that promote resilience in these dynamic ecosystems. Three community-wide mechanisms that underlie resilience are (a) partitioning (competition/facilitation) of dynamically varying resources, (b) dispersal, recolonization, and recruitment promoted by connectivity, and (c) functional redundancy in communities promoted by resource heterogeneity and refugia. Along with taxonomic and phylogenetic identity, biological traits related to feeding specialization, dispersal ability, and habitat specialization mediate organism responses to disturbance. Measures of these factors might also enable assessment of the relative contributions of different mechanisms to community resilience. Interactions between abiotic drivers and biotic aspects of resource use, dispersal, and persistence have clear implications for river conservation and management. To support these management needs, we propose a set of taxonomic, phylogenetic, and life-history trait metrics that might be used to measure resilience mechanisms. By identifying such indicators, our proposed framework can enable targeted management strategies to adapt river ecosystems to global change.
  • Blanka, Gál; Szivák, ldikó; Heino, Jani; Schmera, Dénes (2019)
    Ecological Indicators 104: 357-364
    Understanding the effects of urbanization on the diversity of freshwater macroinvertebrates is an important topic of biodiversity research and has direct conservation relevance. The absence of evidence-based systematic overviews on this topic motivated us to perform meta-analyses and to synthetize the present state of knowledge. We observed significant heterogeneity among individual case studies, reporting negative, neutral and positive effects. As expected, urbanization had an overall negative effect on the diversity of freshwater macroinvertebrates. These results are based mainly on the study of lotic (stream and river) ecosystems because there are insufficient data available for lentic (pond and lake) ecosystems. Compared to individual case studies, the present review reports an evidence-based synthesis for the first time. We identified knowledge gaps regarding case studies reporting the effects of urbanization on pond and lake ecosystems, case studies examining the phylogenetic and functional facets of biodiversity, as well case studies investigating the effect of urbanization on the beta diversity component of macroinvertebrate communities. The identification of these knowledge gaps allowed us to make recommendations for future research: (1) report results on specific taxonomic groups and not only the entire macroinvertebrate community, (2) study the impacts of urbanization on macroinvertebrate diversity in different habitat types and understudied continents, (3) focus on the functional and phylogenetic facets of diversity and (4) examine community differentiation (e.g. beta diversity) in urban freshwater ecosystems. Our results also suggested that the analysis of diversity- environment relationships is crucial for developing macroinvertebrate indicators especially in the increasingly urbanized world.
  • Li, Zhengfei; Wang, Jun; Meng, Xingliang; Heino, Jani; Sun, Meiqin; Jiang, Xiaoming; Xie, Zhicai (2019)
    Freshwater Science 38 (1): 170-182
    Disentangling the effects of dispersal mode on the environmental and spatial processes structuring biological assemblages is essential to understanding the mechanisms of species coexistence and maintenance. Here, we use field investigations to link dispersal mode with environmental and spatial processes that control stream macroinvertebrate assemblage structure across the Yarlung Zangbo Grand Canyon of Tibet (Tibetan Plateau). We sampled macroinvertebrates in streams that occur in 4 distinct regions. Each of these regions has a steep elevational gradient but different altitude ranges, climate types, and water replenishment sources. We classified macroinvertebrate taxa into passive and active dispersal mode groups to test whether macroinvertebrates with different dispersal modes responded differently to environmental and spatial processes. Our results showed that the assemblage structure of active dispersal groups was more strongly determined by environmental variables (habitat filtering/species sorting) than spatial factors both within and across regions. In contrast, the structure of passive dispersers was more strongly associated with spatial factors than environmental filtering in the entire study area and within lower canyon regions. However, spatial effects were not important for either type of dispersal group in the upper canyon regions, especially in the region with glacier-fed streams, indicating the predominance of species sorting processes in these harsh environments. Furthermore, the spatial structuring of assemblages became stronger as habitat filtering declined, which indicates a reduction in species sorting processes in less harsh environments. Our findings demonstrate diverse responses of macroinvertebrate assemblages to environmental and spatial processes across this poorly-known highland river system, and imply that dispersal mode influences the underlying mechanisms of community variation.
  • Cai, Yongjiu; Zhang, You; Hu, Zhixin; Deng, Jianming; Qin, Boqiang; Yin, Hongbin; Wang, Xiaolong; Gong, Zhijun; Heino, Jani (2019)
    Ecological Indicators 103: 713-721
    Metacommunity theory emphasizes that local communities are jointly affected by environmental filtering and spatial processes. However, the roles of spatial processes are often given insufficient attention in bioassessment practices, which may bias the assessments of ecological status based on biotic metrics. Here, we quantified the relative importance and the seasonal stability of spatial processes, natural conditions and human-induced factors in structuring variation in different bioassessment metrics based on macroinvertebrate communities. Our study systems were two extensively sampled large and shallow lakes with strong nutrient gradients related to human disturbance. The roles of different drivers were examined for three kinds of indicators: general diversity, trait-based and taxonomic distinctness metrics, and their performance in characterizing human disturbance was evaluated. Overall, human-induced and spatial factors were all important in explaining variation in the three types of bioassessment metrics. Contrary to our expectations, however, we found that the importance of spatial processes on bioassessment metrics can be comparable to the effects of local environmental conditions at the within-lake scale. Furthermore, the results showed substantial seasonal variability in the relative roles of different drivers, which might be linked to life-cycle seasonality of macroinvertebrates. As expected, trait-based metrics generally were best associated with human-induced variables in both lakes, whereas general diversity and taxonomic distinctness metrics performed poorly. The low effectiveness of taxonomic distinctness metrics might due to low species richness associated with high nutrient levels. To conclude, our results suggest that bioassessment cannot exclusively rely on the idea of environmental filtering even if we focus on fine spatial scales. We hence strongly urge that spatial processes, natural drivers and temporal variability should be better considered in combination in the development and application of bioassessment approaches. In addition, taxonomic distinctness measures should be used with caution, especially for the ecosystems and organism groups typically characterized by low species richness.
  • Zhang, You; Cheng, Long; Li, Kuanyi; Zhang, Lu; Cai, Yongjiu; Wang, Xiaolong; Heino, Jani (2019)
    Limnology and Oceanography 64 (3): 1047-1058
    Eutrophication alters the trophic dynamics in lakes and may result in biotic homogenization. How nutrient enrichment drives patterns of taxonomic and functional (i.e., trait‐based) homogenization of macroinvertebrate assemblages at within‐lake (local) and among‐lake (regional) scales is, however, not well understood. Taxonomic and functional compositions of macroinvertebrate assemblages in 41 lakes of the middle and lower reaches of the Yangtze River and Huaihe River were analyzed at within‐lake and among‐lake scales. Our results indicated that there was a significant difference in macroinvertebrate assemblages among lakes under different trophic status, and that total phosphorus was the major environmental factor that regulated both taxonomic and functional beta diversity of macroinvertebrate assemblages. That the abundances of pollution‐tolerant species (e.g., Limnodrilus hoffmeisteri and Microchironomus tabarui) increased with trophic state contributed the most to among‐lake dissimilarity. Functional beta diversity was significantly positively correlated with taxonomic beta diversity, while functional beta diversity was on average lower than taxonomic beta diversity. A combination of univariate and multivariate techniques revealed that nutrient enrichment homogenized taxonomic and functional diversity of benthic macroinvertebrate assemblages in shallow lakes at within‐lake and among‐lake scales, and that there was an overall trend toward taxonomic homogenization that exceeded the trend of functional homogenization. Thus, taxonomic and functional compositions should be considered simultaneously to improve understanding of the response of aquatic communities to anthropogenic disturbance, as the loss and gain of species may be influenced by species‐specific features, and functional composition may exhibit a relatively high correspondence with changes in environmental conditions.
  • Li, Zhengfei; Wang, Jun; Liu, Zhenyuan; Meng, Xingliang; Heino, Jani; Jiang, Xuankong; Xiong, Xiong; Jiang, Xiaoming; Xie, Zhicai (2019)
    Science of the Total Environment 655:1288-1300
    Examining the relative contribution of local environmental stressors and regional factors in structuring biological communities is essential for biodiversity conservation and environmental assessment, yet their relative roles for different community characterizations remain elusive. Here, we examined the responses of taxonomic and functional structures of stream macroinvertebrate communities to local and regional factors across a human-induced environmental gradient in the Han River Basin, one subtropical biodiversity hotspot in China. Our objectives were: 1) to examine the responses of traditional taxonomic measures and functional traits to anthropogenic disturbances; 2) to compare the relative importance of environmental versus spatial variables and catchment-scale versus reach-scale variables for the two community characterizations. We found that both species and trait compositions performed well in differentiating anthropogenic disturbances, indicating that both taxonomic and functional structures of macroinvertebrate communities were strongly altered by human activities. Particularly, some traits related to life history (e.g., voltinism), resilience and resistance (e.g., adult flying ability) are well suited for predicting changes of communities towards anthropogenic disturbances owing to their mechanistic relationship with environmental gradients. We found that environmental variables played more important roles than spatial effects in structuring both taxonomic and functional facets of macroinvertebrate communities. Environmental filtering was more important in determining functional than taxonomic structure, and the opposite was true for spatial effects. In terms of environmental variables, catchment land-uses played the primary role in determining taxonomic composition, whereas reach-scale variables related to local habitat heterogeneity were more influential for functional structure. Our study highlights the importance of employing metacommunity perspectives and different community characterizations in both theoretical and applied research. For stream bioassessment and management, we argue that the combination of taxonomic and functional characterizations of community should be implemented, as different facets of biological communities responded to different types of anthropogenic disturbances.
  • Roa-Fuentes, Camilo A.; Heino, Jani; Cianciaruso, Marcus V.; Ferraz, Silvio; Zeni, Jaquelini O.; Casatti, Lilian (2019)
    Freshwater Biology (2019) 64 (3): 447-460
    A multi‐faceted assessment of diversity is needed to improve our understanding of the mechanisms underlying biodiversity patterns and to reveal the impacts of land use alterations on β‐diversity. In this study, we analysed stream fish β‐diversity based on taxonomic, functional, and phylogenetic facets in an intensively cultivated tropical region. We sampled 43 stream reaches in the northwest of São Paulo State, south‐eastern Brazil. Each sampling site was characterised according to catchment‐scale features, landscape dynamic indicators, local‐scale features, and distance between stream reaches as network distance (a proxy for dispersal processes). As response variables, we considered taxonomic, functional, and phylogenetic β‐diversities coupled with a null‐model approach. For each β‐diversity metric, we calculated the mean overall value and tested whether the mean value was different from that expected by chance. To examine variation in β‐diversity for the three facets and determine the relative contributions of predictor variables, we used a distance‐based approach. Taxonomic and functional β‐diversities were higher from the expected value under a null model, suggesting that community assembly of these facets was dominated by deterministic processes. In contrast, phylogenetic β‐diversity was not different from that expected by chance, suggesting that the lineage composition of these assemblages was random. Furthermore, for all three facets, there was a positive environment‐β‐diversity relationship that was determined primarily by local‐scale features, whereas catchment features and landscape dynamic indicators were not important. In addition, none of the β‐diversity facets was correlated with stream network distance, indicating that dispersal processes were not strongly structuring fish assemblages. Our study suggested that although multiple facets of stream fish β‐diversity are ruled mainly by deterministic processes (e.g. species sorting), stochasticity is also important in community assembly. An interesting finding was the mismatch between phylogenetic versus taxonomic and functional β‐diversity. It is likely that the lack of non‐random structure in phylogenetic β‐diversity is due to the variation of phylogenetic signal in some functional traits. Given that landscape dynamic indicators were not correlated with measures of β‐diversity, we suggest that the recent sugarcane expansion in our study area probably has not critically affected stream fish β‐diversity. Also, it is possible that catchment variables presented little variability and did not overwhelm the effect of local environmental variables on β‐diversity. In conclusion, our study suggests that even highly disturbed tropical agroecosystems with a pool of species that is probably decimated, can still display a relatively high β‐diversity determined mainly by species sorting. These findings suggest key environmental features that must be considered in restoration or conservation of β‐diversity in agroecosystems. Specifically, since variation in β‐diversity was explained mainly by local‐scale environmental gradients, conservation schemes would ideally protect enough sites to capture this entire gradient. Overall, the knowledge of multiple facets can foment more effective conservation and restoration actions by providing a more comprehensive view of the structuring factors of assemblages.
  • Pekkonen, Minna; Koljonen, Saija; Raunio, Anne; Kostamo, Kirsi; Soimakallio, Sampo (Finnish Environment Institute, 2019)
    SYKE POLICY BRIEF / 20.11.2019
  • Pekkonen, Minna; Koljonen, Saija; Raunio, Anne; Kostamo, Kirsi; Soimakallio, Sampo (Suomen ympäristökeskus, 2019)
    SYKE POLICY BRIEF / 20.11.2019
  • Attila, Mikko; Huotari, Essi; Johansson, Annika (Suomen ympäristökeskus, 2019)
    Suomen ympäristökeskuksen raportteja 44/2019
    Valtion ympäristölupaviranomainen eli neljä aluehallintovirastoa antoi vuonna 2016 yhteensä 758 ja vuonna 2017 yhteensä 550 ympäristönsuojelulain mukaista lupapäätöstä. Näiden lisäksi myös kunnissa annettiin huomattava määrä ympäristölupia ympäristövaikutuksiltaan pienemmille toiminnoille. Eniten lupia annettiin jätteiden käsittelylle, eläinsuojille sekä turvetuotannolle, jotka yhdessä kattoivat lähes 60 % kaikista annetuista luvista. Lupia annettiin runsaasti myös jätevedenpuhdistamoille sekä kemianteollisuuteen ja kemikaalien tai polttoaineiden varastointiin, käyttöön tai käsittelyyn. Ympäristölupahakemusten keskimääräinen käsittelyaika vuonna 2016 oli 19,0 kuukautta ja vuonna 2017 15,5 kuukautta. Asianosaisten muistutuksia ja mielipiteitä jätettiin lukumääräisesti eniten turvetuotannon hakemuksiin liittyen. Valitus jätettiin kuudesosasta lupapäätöksiä, ja eniten valitettiin turvetuotannon luvista.