Environmental factors affecting the spatio-temporal distribution of zooplankton functional groups in a deep alkaline lake

IF 2.2 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY
Zeynep Dorak, Özcan Gaygusuz, Latife Köker, Meriç Albay, Reyhan Akçaalan
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Abstract

In recent years, trait-based studies have gained importance as an extension of taxonomic studies to better understanding ecosystem processes. However, these studies are still very limited in Mediterranean freshwaters. The aim of the study was to link functional groups with environmental factors and ecosystem processes for zooplankton in the Lake Iznik, which is an alkaline lake in Türkiye. Morphological, physiological and behavioural categories have been selected as response traits. Physical and chemical variables and trophic state are important predictors of functional traits. A total of 26 zooplankton taxa belonging to four taxonomic groups were classified into five functional groups according to functional traits. It was found that functional groups were significantly affected by seasonally changing environmental conditions, but not by depth. The main predictor of zooplankton functional groups was electrical conductivity. As a result of the alkaline conditions and the deterioration of the trophic state of the lake (meso ~ to eutrophy), the low taxonomic richness, dominance of the microphagous feeding type and small-bodied taxa indicate ecosystem degradation leading to functional depletion (homogenisation). The results showed that temporal variations of environmental variables can affect zooplankton functional groups and that trait-based zooplankton studies will enable a better understanding of ecosystem processes in deep alkaline lakes.

Abstract Image

影响深碱性湖泊浮游动物功能群时空分布的环境因素
近年来,作为分类学研究的延伸,基于性状的研究在更好地了解生态系统过程方面的重要性日益凸显。然而,这些研究在地中海淡水中仍然非常有限。本研究的目的是将图尔基耶碱性湖泊伊兹尼克湖中浮游动物的功能群与环境因素和生态系统过程联系起来。研究选择了形态、生理和行为类别作为响应特征。物理和化学变量以及营养状态是预测功能特征的重要因素。根据功能特征将属于 4 个分类群的 26 个浮游动物类群分为 5 个功能群。研究发现,功能组受季节性变化的环境条件影响很大,但不受深度影响。浮游动物功能组的主要预测因子是电导率。由于碱性条件和湖泊营养状态的恶化(中度~到萎缩),分类丰富度低、微吞食类型和小体类群占主导地位,表明生态系统退化导致功能耗竭(同质化)。研究结果表明,环境变量的时间变化会影响浮游动物的功能群,基于性状的浮游动物研究将有助于更好地了解深层碱性湖泊的生态系统过程。
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来源期刊
Hydrobiologia
Hydrobiologia 生物-海洋与淡水生物学
CiteScore
5.40
自引率
11.50%
发文量
288
审稿时长
4.9 months
期刊介绍: Hydrobiologia publishes original research, reviews and opinions regarding the biology of all aquatic environments, including the impact of human activities. We welcome molecular-, organism-, community- and ecosystem-level studies in contributions dealing with limnology and oceanography, including systematics and aquatic ecology. Hypothesis-driven experimental research is preferred, but also theoretical papers or articles with large descriptive content will be considered, provided they are made relevant to a broad hydrobiological audience. Applied aspects will be considered if firmly embedded in an ecological context.
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