A hidden species becoming visible : biogeography and ecology of Rhynchotalona latens (Cladocera, Anomopoda, Chydoridae)

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Nevalainen , L , Kivila , E H , Luoto , T P , Rantala , M V & Van Damme , K 2019 , ' A hidden species becoming visible : biogeography and ecology of Rhynchotalona latens (Cladocera, Anomopoda, Chydoridae) ' , Hydrobiologia , vol. 837 , no. 1 , pp. 47-59 . https://doi.org/10.1007/s10750-019-3958-z

Title: A hidden species becoming visible : biogeography and ecology of Rhynchotalona latens (Cladocera, Anomopoda, Chydoridae)
Author: Nevalainen, Liisa; Kivila, E. Henriikka; Luoto, Tomi P.; Rantala, Marttiina V.; Van Damme, Kay
Contributor: University of Helsinki, Ecosystems and Environment Research Programme
University of Helsinki, Ecosystems and Environment Research Programme
University of Helsinki, University of Lausanne
University of Helsinki, Tvärminne Zoological Station
Date: 2019-07
Language: eng
Number of pages: 13
Belongs to series: Hydrobiologia
ISSN: 0018-8158
URI: http://hdl.handle.net/10138/304555
Abstract: A long hidden chydorid (Chydoridae, Cladocera) taxon, first found as fossil specimens and recently redefined as Rhynchotalona latens (Sarmaja-Korjonen et al., Hydrobiologia 436: 165-169, 2000) is investigated for its biogeography and ecology. Late Holocene sediment sequence from Lake Sylvilampi, NE Finnish Lapland, and R. latens spatial distribution in relation to limno-climatic attributes in Finland were examined. Principal component analyses of fossil cladoceran communities showed that R. latens is mostly affiliated with Alonella excisa-Alonopsis elongata-Alonella nana species pool. Generalized linear modeling of R. latens responses to limno-climatic variation indicated that it prefers acidic, mesotrophic, humic and shallow lakes with organic sediments in NE Lapland and has a north boreal-subarctic climatic affiliation. At the northern end of its geographical distribution (NE Lapland), it reproduces with abundant gamogenesis under environmental stress. The specialized taxon is a benthic detritivore and scraper and has a Holarctic northern-alpine distribution. It is a glacial relict associated with modern analogs of periglacial aquatic environments, and it occurs in semi-aquatic wetlands, lush lake littorals and clear and cold waters. Examination of chydorids as bioindicators, especially those with restricted niches, allow us to understand biodiversity responses of lake littorals under changing limno-climatic regimes.
Subject: Paleolimnology
Fossil cladocera
Chydoridae
Rhynchotalona
Invisible biodiversity
SUBFOSSIL REMAINS
FINNISH LAPLAND
BIODIVERSITY
CRUSTACEA
BRANCHIOPODA
NORTHERN
CLIMATE
LAKES
CONSERVATION
COMMUNITIES
1181 Ecology, evolutionary biology
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