کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8914866 1640748 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Contrasting responses to long-term climate change of carbon flows to benthic consumers in two different sized lakes in the Baltic area.
ترجمه فارسی عنوان
پاسخ های متناسب با تغییرات آب و هوایی طولانی مدت جریان کربن به مصرف کنندگان بتنی در دو دریاچه مختلف در منطقه بالتیک.
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
چکیده انگلیسی
The study of lake sediments and archived biological remains is a promising approach to better understand the impacts of climate change on aquatic ecosystems. Small lakes have been shown to be strongly sensitive to past climate change, but similar information is lacking for large lakes. By identifying responses to climate change of carbon flows through benthic food web in two different sized lakes, we aimed to understand how lake morphometry can mediate the effects of climate change. We reconstructed the dynamics of phytoplankton community composition and carbon resources sustaining chironomid biomass during the Holocene from the combined analysis of sedimentary pigment quantification and carbon stable isotopic composition of subfossil chironomid head capsules (δ13CHC) in a large lake in the Baltic area (Estonia). Our results showed that chironomid biomass in the large lake was mainly sustained by phytoplankton, with no significant relationship between δ13CHC values and temperature fluctuations. We suggest that lake morphometry (including distance of the sampling zone to the shoreline, and lake volume for primary producers) mediates the effects of climate change, making large lakes less sensitive to climate change. Complementary studies are needed to better understand differences in organic matter dynamics in different sized lakes and to characterize the response of the aquatic carbon cycle to past climate change.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Quaternary Science Reviews - Volume 187, 1 May 2018, Pages 168-176
نویسندگان
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