Impacts of Land Use and Climate Change on Freshwater Ecosystems in France

Bayramoglu, Basak; Chakir, Raja; Lungarska, Anna

doi:10.1007/s10666-019-09673-x

Cited by 23 publications

(8 citation statements)

References 41 publications

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“…Multiple pressures threaten European stream ecosystems [1][2][3][4]. These pressures result from various human activities, such as modifications of river morphology [5][6][7] and hydrology [6,8,9], intensive agriculture [10][11][12][13][14], urbanization [13,15,16] and mining [17][18][19]. Together, these activities often lead to the degradation of stream ecosystems, reducing biodiversity, water security and ecosystem services [4,20].…”

Section: Introductionmentioning

confidence: 99%

Small Patches of Riparian Woody Vegetation Enhance Biodiversity of Invertebrates

Forio

Troyer

Lock

et al. 2020

Water

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Patches of riparian woody vegetation potentially help mitigate environmental impacts of agriculture and safeguard biodiversity. We investigated the effects of riparian forest on invertebrate diversity in coupled stream-riparian networks using a case study in the Zwalm river basin (Flanders, Belgium). Agriculture is one of the main pressures in the basin and riparian forest is limited to a number of isolated patches. Our 32 study sites comprised nine unshaded “unbuffered” sites which were paired with nine shaded “buffered” sites on the same stream reach, along with five ‘least-disturbed’ sites and nine downstream sites. We sampled water chemistry, habitat characteristics and stream and riparian invertebrates (carabid beetles and spiders) at each site. Three methods were used to quantify riparian attributes at different spatial scales: a visually-assessed qualitative index, quantitative estimates of habitat categories in six rectangular plots (10 × 5 m) and geographic information system (GIS)-derived land cover data. We investigated relationships between invertebrates and riparian attributes at different scales with linear regression and redundancy analyses. Spiders and carabids were most associated with local riparian attributes. In contrast, aquatic macroinvertebrates were strongly influenced by the extent of riparian vegetation in a riparian band upstream (100–300 m). These findings demonstrate the value of quantifying GIS-based metrics of riparian cover over larger spatial scales into assessments of the efficacy of riparian management as a complement to more detailed local scale riparian assessments in situ. Our findings highlight the value of even small patches of riparian vegetation in an otherwise extensively disturbed landscape in supporting biodiversity of both terrestrial and freshwater invertebrates and emphasize the need to consider multiple spatial scales in riparian management strategies which aim to mitigate human impacts on biodiversity in stream-riparian networks.

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Section: Introductionmentioning

confidence: 99%

Small Patches of Riparian Woody Vegetation Enhance Biodiversity of Invertebrates

Forio

Troyer

Lock

et al. 2020

Water

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“…For running freshwater systems, land-use change and climate change are predicted to be the most important threats to biodiversity this century (Sala et al, 2000). Future climate-change effects on a given freshwater system will likely depend on the degree of local land-use impact (Bayramoglu et al, 2020;Zhai et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Individual and combined impacts of carbon dioxide enrichment, heatwaves, flow velocity variability, and fine sediment deposition on stream invertebrate communities

Hunn,

Orr,

Kelly

et al. 2024

Global Change Biology

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Climate change and land‐use change are widely altering freshwater ecosystem functioning and there is an urgent need to understand how these broad stressor categories may interact in future. While much research has focused on mean temperature increases, climate change also involves increasing variability of both water temperature and flow regimes and increasing concentrations of atmospheric CO2, all with potential to alter stream invertebrate communities. Deposited fine sediment is a pervasive land‐use stressor with widespread impacts on stream invertebrates. Sedimentation may be managed at the catchment scale; thus, uncovering interactions with these three key climate stressors may assist mitigation of future threats. This is the first experiment to investigate the individual and combined effects of enriched CO2, heatwaves, flow velocity variability, and fine sediment on realistic stream invertebrate communities. Using 128 mesocosms simulating small stony‐bottomed streams in a 7‐week experiment, we manipulated dissolved CO2 (ambient; enriched), fine sediment (no sediment; 300 g dry sediment), temperature (ambient; two 7‐day heatwaves), and flow velocity (constant; variable). All treatments changed community composition. CO2 enrichment reduced abundances of Orthocladiinae and Chironominae and increased Copepoda abundance. Variable flow velocity had only positive effects on invertebrate abundances (7 of 13 common taxa and total abundance), in contrast to previous experiments showing negative impacts of reduced velocity. CO2 was implicated in most stressor interactions found, with CO2 × sediment interactions being most common. Communities forming under enriched CO2 conditions in sediment‐impacted mesocosms had ~20% fewer total invertebrates than those with either treatment alone. Copepoda abundances doubled in CO2‐enriched mesocosms without sediment, whereas no CO2 effect occurred in mesocosms with sediment. Our findings provide new insights into potential future impacts of climate change and land use in running freshwaters, in particular highlighting the potential for elevated CO2 to interact with fine sediment deposition in unpredictable ways.

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“…Specifically, we find that farmers' short-term adaptation to higher temperatures would lead them to use more pesticides, and in particular the most hazardous ones. We thus join the small number of papers documenting negative impacts of farmers' adaptation on environmental outcomes Hashida and Lewis, 2019;Bayramoglu et al, 2020), and extend these results to human health. To our knowledge, we are the first to document potential negative indirect impacts of climate change on health via farmers' adaptation (through pesticide use in particular), extending the previous works that estimated the direct impacts of climate change on human health (Deschenes, 2014;Barreca et al, 2016;Hu and Li, 2019;Carleton et al, 2022).…”

Section: Introductionmentioning

confidence: 85%

Weather shocks and pesticide purchases

Bareille,

Chakir,

Keles

2024

European Review of Agricultural Economics

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This paper investigates whether farmers adapt their pesticide use to cope with weather shocks. Using a unique, exhaustive dataset detailing all active substance purchases per zip code in France between 2014 and 2019, we econometrically explain abnormal pesticide purchase deviations by weather shocks. We identify heterogeneous weather impacts across pesticide types, seasons and locations. Because our analyses suggest limited year-to-year pesticide storage and farmers’ adaptation along other margins, we interpret our estimates as true weather impacts on pesticide use. Our preferred estimates suggest that, ceteris paribus, farmers increase pesticide use by seven to fifteen per cent in 2050 under a RCP4.5 climate change scenario.

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Impacts of Land Use and Climate Change on Freshwater Ecosystems in France

Cited by 23 publications

References 41 publications

Small Patches of Riparian Woody Vegetation Enhance Biodiversity of Invertebrates

Small Patches of Riparian Woody Vegetation Enhance Biodiversity of Invertebrates

Individual and combined impacts of carbon dioxide enrichment, heatwaves, flow velocity variability, and fine sediment deposition on stream invertebrate communities

Weather shocks and pesticide purchases

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