Ciszewski Krzysztof, Wawrzyniak Wawrzyniec, Czerniejewski Przemysław
Department of Fisheries Management, Faculty of Food Sciences and Fisheries, West Pomeranian University of Technolgy, Królewicza 4, 71-550 Szczecin, Poland.
Animals (Basel). 2021 Dec 22;12(1):17. doi: 10.3390/ani12010017.
It is still to be confirmed whether global warming with its predicted elevated water temperature will cause an increase in predation and alter phenological and physiological processes leading to changes in the size of aquatic organisms. In an experimental system of water column stratification simulating a natural combination of field conditions, we created artificial abiotic factors that mimicked the natural environment, i.e., light intensity, oxygen conditions, and thermal stratification. Subsequently, we added biotic factors such as algae, , and planktivorous fish. We studied the intensity of foraging of planktivorous fish on individuals of per min in different conditions of biotic and abiotic gradients. We demonstrated a possible scenario involving the risk of elimination of large prey within macrocladocera communities by predatory pressure as a result of climate change. A higher intensity of foraging of planktivorous fish caused or increased the occurrence of larger groups of planktonic animals with a smaller body size. The mechanisms of a future scenario were discovered at a higher trophic level in the aquatic environment.
全球变暖及其预测的水温升高是否会导致捕食增加，并改变物候和生理过程，从而导致水生生物体型变化，仍有待证实。在一个模拟自然田间条件组合的水柱分层实验系统中，我们创造了模拟自然环境的人工非生物因素，即光照强度、氧气条件和热分层。随后，我们添加了藻类等生物因素和食浮游生物的鱼类。我们研究了在不同生物和非生物梯度条件下，食浮游生物的鱼类每分钟对大型溞个体的捕食强度。我们证明了一种可能的情况，即气候变化导致的捕食压力可能会使大型溞群落中的大型猎物面临被淘汰的风险。食浮游生物的鱼类较高的捕食强度导致或增加了体型较小的浮游动物群体的出现。在水生环境的较高营养级发现了未来情景的机制。
