Terrestrial carbohydrates support freshwater zooplankton during phytoplankton deficiency

Show full item record



Permalink

http://hdl.handle.net/10138/166699

Citation

Taipale , S J , Galloway , A W E , Aalto , S L , Kahilainen , K K , Strandberg , U & Kankaala , P 2016 , ' Terrestrial carbohydrates support freshwater zooplankton during phytoplankton deficiency ' , Scientific Reports , vol. 6 , 30897 . https://doi.org/10.1038/srep30897

Title: Terrestrial carbohydrates support freshwater zooplankton during phytoplankton deficiency
Author: Taipale, Sami J.; Galloway, Aaron W. E.; Aalto, Sanni L.; Kahilainen, Kimmo K.; Strandberg, Ursula; Kankaala, Paula
Contributor: University of Helsinki, Lammi Biological Station
University of Helsinki, University of Jyväskylä
University of Helsinki, Environmental Sciences
Date: 2016-08-11
Language: eng
Number of pages: 15
Belongs to series: Scientific Reports
ISSN: 2045-2322
URI: http://hdl.handle.net/10138/166699
Abstract: Freshwater food webs can be partly supported by terrestrial primary production, often deriving from plant litter of surrounding catchment vegetation. Although consisting mainly of poorly bioavailable lignin, with low protein and lipid content, the carbohydrates from fallen tree leaves and shoreline vegetation may be utilized by aquatic consumers. Here we show that during phytoplankton deficiency, zooplankton (Daphnia magna) can benefit from terrestrial particulate organic matter by using terrestrial-origin carbohydrates for energy and sparing essential fatty acids and amino acids for somatic growth and reproduction. Assimilated terrestrial-origin fatty acids from shoreline reed particles exceeded available diet, indicating that Daphnia may convert a part of their dietary carbohydrates to saturated fatty acids. This conversion was not observed with birch leaf diets, which had lower carbohydrate content. Subsequent analysis of 21 boreal and subarctic lakes showed that diet of herbivorous zooplankton is mainly based on high-quality phytoplankton rich in essential polyunsaturated fatty acids. The proportion of low-quality diets (bacteria and terrestrial particulate organic matter) was <28% of the assimilated carbon. Taken collectively, the incorporation of terrestrial carbon into zooplankton was not directly related to the concentration of terrestrial organic matter in experiments or lakes, but rather to the low availability of phytoplankton.
Subject: DISSOLVED ORGANIC-CARBON
FATTY-ACID-COMPOSITION
WHOLE-LAKE EXPERIMENTS
AQUATIC FOOD-WEB
ALLOCHTHONOUS CARBON
STABLE-ISOTOPES
HERBIVOROUS ZOOPLANKTON
TEMPERATE LAKES
SEASONAL SHIFTS
LAND-USE
1181 Ecology, evolutionary biology
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
rep30897_1.pdf 1.543Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record