Topographically shaded lakes may provide refugia for cold-adapted aquatic fauna threatened by climate change
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Dátum
2025
Názov časopisu
ISSN časopisu
Názov zväzku
Vydavateľ
Springer : Dordrecht
ISBN
ISSN
0018-8158
1573-5117
1573-5117
Abstrakt
Understanding the structure and diversity of high-altitude lake communities and the patterns of their altitudinal changes is important for predicting their response to ongoing climate change. We analysed littoral benthic communities of 18 mountain lakes of glacial origin distributed along a 500-m altitudinal gradient and characterized by differing topographic shading levels: unshaded lakes and shaded lakes with a substantially lower (by 1151 h) mean annual duration of direct solar radiation. We hypothesized that local topographic shading modifies diversity–altitude relationships and affects the pattern of community turnover along the altitudinal gradient. We found a decreasing trend in diversity with increasing altitude and a significant deviation from that pattern in shaded lakes. Investigated lake groups supported distinct communities in lower altitudes. However, their community composition converged towards higher altitudes in communities typical for a greater abundance of cold stenotherms. The proportion of cold-stenothermal species increased with increasing altitude in shaded lakes and was notably greater than that in unshaded lakes along the studied altitudinal gradient. The lower temperatures of shaded lakes and different temperature variabilities of the two groups of lakes likely explain the observed patterns. We hypothesize that topographically shaded lakes may provide refugia for cold-stenothermal communities threatened by ongoing global warming.
Popis
In: Hydrobiologia : The International Journal of Aquatic Sciences. Dordrecht : Springer, 2025. ISSN 0018-8158. Vol. 852, no. 20 (2025), pp. 5147-5162.
Kľúčové slová
vodné živočíchy, aquatic animals, fauna, jazerá, lakes, klimatické zmeny, climate changes, climatic changes
Výstup z projektu
VEGA 1/0400/21 Dynamika bentických spoločenstiev tatranských plies pod vplyvom klimatickej zmeny a acidifikácie: individuálny a synergický vplyv dvoch globálnych stresorov
APVV-20-0358 Čítanie v prírodných archívoch: tisíce rokov dlhá história prostredia a klimatických zmien zaznamenaná v alpínskych jazerách Ukrajinských Karpát
Citácia
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CC BY Creative Commons Attribution 4.0. International
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess