When trends intersect: The challenge of protecting freshwater ecosystems under multiple land use and hydrological intensification scenarios

Davis, Jenny; O’Grady, Anthony P.; Dale, Allan; Arthington, Angela; Gell, Peter; Driver, Patrick; Bond, Nick; Casanova, Michelle T.; Finlayson, C. Max; Watts, Robin; Capon, Samantha J.; Nagelkerken, Ivan; Tingley, Reid; Fry, Brian; Page, Timothy J.; Specht, Alison

doi:10.1016/j.scitotenv.2015.03.127

Cited by 118 publications

(86 citation statements)

References 102 publications

(126 reference statements)

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“…With increasing demand for water, food, fibre, minerals, and energy in the 21st century, the water related pressures have degraded conditions of these natural resources further (e.g., Davis et al, 2015). It is claimed that solutions for water issues are not possible without a joint effort by the various stakeholders involved in understanding the complexity of water management in large river basins (e.g., Biswas, 2004).…”

Section: Cladoceran-inferred Responses To Hydrological Shifts In Murrmentioning

confidence: 99%

“…However, the flow regime of large rivers has been consistently modified to meet continual demands of water for mono-agriculture and hydroelectricity (Nilsson and Berggren, 2000;Davis et al, 2015). Many floodplain wetlands have been transformed into a new regime as a result of either overallocation of water to offstream uses, or to other alterations to the natural flow regimes of large river systems (Walker, 1985).…”

Section: Introductionmentioning

confidence: 99%

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A century-scale, human-induced ecohydrological evolution of wetlands of two large river basins in Australia (Murray) and China (Yangtze)

Kattel

Dong

Yang

2016

Hydrol. Earth Syst. Sci.

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Abstract. Recently, the provision of food and water resources of two of the world's largest river basins, the Murray and the Yangtze, has been significantly altered through widespread landscape modification. Long-term sedimentary archives, dating back for some centuries from wetlands of these river basins, reveal that rapid, basin-wide development has reduced the resilience of biological communities, resulting in considerable decline in ecosystem services, including water quality. Large-scale human disturbance to river systems, due to river regulation during the mid-20th century, has transformed the hydrology of rivers and wetlands, causing widespread modification of aquatic biological communities. Changes to cladoceran zooplankton (water fleas) were used to assess the historical hydrology and ecology of three Murray and Yangtze river wetlands over the past century. Subfossil assemblages of cladocerans retrieved from sediment cores (94, 45, and 65 cm) of three wetlands: Kings Billabong (Murray), Zhangdu, and Liangzi lakes (Yangtze), showed strong responses to hydrological changes in the river after the mid-20th century. In particular, river regulation caused by construction of dams and weirs together with river channel modifications, has led to significant hydrological alterations. These hydrological disturbances were either (1) a prolonged inundation of wetlands or (2) reduced river flow, both of which caused variability in wetland depth. Inevitably, these phenomena have subsequently transformed the natural wetland habitats, leading to a switch in cladoceran assemblages to species preferring poor water quality, and in some cases to eutrophication. The quantitative and qualitative decline of wetland water conditions is indicative of reduced ecosystem services, and requires effective restoration measures for both river basins which have been impacted by recent socioeconomic development and climate change.

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Section: Cladoceran-inferred Responses To Hydrological Shifts In Murrmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A century-scale, human-induced ecohydrological evolution of wetlands of two large river basins in Australia (Murray) and China (Yangtze)

Kattel

Dong

Yang

2016

Hydrol. Earth Syst. Sci.

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“…Changes in temperature interact with changes in precipitation and cause profound shifts in water balance, such as snowpack melting and accumulation (Barnett et al, 2005;Zhang et al, 2015), intensification of hydrologic cycle (Creed et al, 2015;Davis et al, 2015), precipitation partitioning (Duan et al, 2016b;Zhou et al, 2015), extreme floods and droughts (Duan et al, 2016a;Trenberth et al, 2014;Duan and Mei, 2014b), and can lead to hydrological "nonstationarity" (Milly et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Future shift of the relative roles of precipitation and temperature in controlling annual runoff in the conterminous United States

Duan

Sun

McNulty

et al. 2017

Hydrol. Earth Syst. Sci.

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Abstract. This study examines the relative roles of climatic variables in altering annual runoff in the conterminous United States (CONUS) in the 21st century, using a monthly ecohydrological model (the Water Supply Stress Index model, WaSSI) driven with historical records and future scenarios constructed from 20 Coupled Model Intercomparison Project Phase 5 (CMIP5) climate models. The results suggest that precipitation has been the primary control of runoff variation during the latest decades, but the role of temperature will outweigh that of precipitation in most regions if future climate change follows the projections of climate models instead of the historical tendencies. Besides these two key factors, increasing air humidity is projected to partially offset the additional evaporative demand caused by warming and consequently enhance runoff. Overall, the projections from 20 climate models suggest a high degree of consistency on the increasing trends in temperature, precipitation, and humidity, which will be the major climatic driving factors accounting for 43-50, 20-24, and 16-23 % of the runoff change, respectively. Spatially, while temperature rise is recognized as the largest contributor that suppresses runoff in most areas, precipitation is expected to be the dominant factor driving runoff to increase across the Pacific coast and the southwest. The combined effects of increasing humidity and precipitation may also surpass the detrimental effects of warming and result in a hydrologically wetter future in the east. However, severe runoff depletion is more likely to occur in the central CONUS as temperature effect prevails.

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“…Climate change is likely to affect water availability through changes in runoff patterns; and might impact plant water demand through changes in evapotranspiration and elevated CO2 concentrations (Palmer, Reidy Liermann et al 2008, Field, Barros et al 2014, Davis, O'Grady et al 2015. Until now, few studies were combining impact of land use change and climate change on future water use , Bonsch, Popp et al 2015.…”

Section: Intensification Of Global Water Cycle Under Global Changementioning

confidence: 99%

“…However only few studies show ecohydrological relationships at global scale (Xenopoulos, Lodge et al 2005). Davis, O'Grady et al (2015) show that hydrological intensification and impact of land use are likely to increase their impact on freshwater ecosystems. Land-use change endorses longer dry season flows via irrigation use altering water quality composition and decreasing dilution flow capacity of detritus, algae and plants (Cooper, Lake et al 2013).…”

Section: Hydro-ecology In Global Contextmentioning

confidence: 99%

Safeguarding water availability for food and ecosystems under global change : modelling and assessment of the role of environmental flows

Kabat¹,

Ludwig²,

Biemans³

et al.

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When trends intersect: The challenge of protecting freshwater ecosystems under multiple land use and hydrological intensification scenarios

Cited by 118 publications

References 102 publications

A century-scale, human-induced ecohydrological evolution of wetlands of two large river basins in Australia (Murray) and China (Yangtze)

A century-scale, human-induced ecohydrological evolution of wetlands of two large river basins in Australia (Murray) and China (Yangtze)

Future shift of the relative roles of precipitation and temperature in controlling annual runoff in the conterminous United States

Safeguarding water availability for food and ecosystems under global change : modelling and assessment of the role of environmental flows

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