Fragility of stream ecosystem functioning in response to drought: an experimental test

河流生态系统应对干旱的脆弱性：实验测试

基本信息

批准号：
NE/J02256X/1
负责人：
Mark Ledger
金额：
$ 43.99万
依托单位：
University of Birmingham
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2012
资助国家：
英国
起止时间：
2012 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FJ02256X%2F1
关键词：
Fragility stream ecosystem functioning response

项目摘要

Climate change and human activities are expected to change the quantity of water entering rivers and streams, with potentially dramatic impacts on animals and plants resident in these ecosystems. In many regions, climate change is expected to reduce rainfall and bring about drought conditions, and water abstraction and river diversions may also reduce flows in rivers and streams. To date, relatively little work has been done to determine the effect of hydrologic droughts on aquatic biodiversity, and less is known about impacts on important processes, such as decomposition and nutrient cycling, that affect water quality and productivity of aquatic life.Our study will use novel experiments to understand the ecological effects of hydrologic droughts in streams, with a view to predicting future change. We will use a series of artificial stream channels to directly manipulate flows, thereby simulating drought episodes, and measure the responses of flora and fauna, and a series of processes that reflect the ecological health of the ecosystem. We will establish a series of experimental drought treatments which differ in the extent of flow reduction, from unaltered reference conditions to extreme low flows that cause habitat loss. We will also examine how the physical nature of the stream bed affects the extent to which animals and plants can withstand periods of drought, and how quickly these communities recover from these events. With a project student, we will investigate how water abstraction, a leading anthropogenic cause of stream drought, affects biodiversity and functioning across a suite of lowland streams in south west England. Together, the results will give valuable insights into the ways in which the environment responds to change brought about through human activities and the likely effects of climate change.

预计气候变化和人类活动将改变进入河流和溪流的水数量，对这些生态系统中居住的动物和植物产生巨大影响。在许多地区，预计气候变化将减少降雨并带来干旱的条件，而抽水和河流的转移也可能减少河流和溪流中的流量。迄今为止，对确定水文干旱对水生生物多样性的影响的工作相对较少，对对重要过程的影响（例如分解和营养循环）影响水上生命的水质和生产力的影响更少。我们将使用一系列人工流通道直接操纵流量，从而模拟干旱发作，并测量动植物的反应，以及一系列反映生态系统生态健康的过程。我们将建立一系列的实验干旱处理，这些干旱在降低程度上有所不同，从不变的参考条件到导致栖息地丧失的极端低流量。我们还将研究流床的物理性质如何影响动物和植物可以承受干旱时期的程度，以及这些社区从这些事件中恢复的速度。我们将与一名项目学生一起研究水抽抽动作用是溪流干旱的主要人为原因，会影响英格兰西南部一系列低地溪流的生物多样性和运作。共同的结果将为环境对通过人类活动带来的变化和气候变化的可能影响的方式提供宝贵的见解。

项目成果

期刊论文数量（10）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Extra terrestrials: drought creates niche space for rare invertebrates in a large-scale and long-term field experiment.

外星人：在大规模、长期的野外实验中，干旱为稀有无脊椎动物创造了利基空间。

DOI：
10.1098/rsbl.2023.0381
发表时间：
2023
期刊：
Biology letters
影响因子：
3.3
作者：
Aspin TWH
通讯作者：
Aspin TWH

Combined supplementary material from Extra terrestrials: drought creates niche space for rare invertebrates in a large-scale and long-term field experiment

来自外星人的组合补充材料：干旱在大规模和长期的野外实验中为稀有无脊椎动物创造了利基空间

DOI：
10.6084/m9.figshare.24487649
发表时间：
2023
期刊：
影响因子：
0
作者：
Aspin T
通讯作者：
Aspin T

Extreme drought pushes stream invertebrate communities over functional thresholds.

DOI：
10.1111/gcb.14495
发表时间：
2019-01
期刊：
Global change biology
影响因子：
11.6
作者：
Aspin TWH;Khamis K;Matthews TJ;Milner AM;O'Callaghan MJ;Trimmer M;Woodward G;Ledger ME
通讯作者：
Ledger ME

Cheddar: analysis and visualisation of ecological communities in R