On the human appropriation of wetland primary production

Cloern, James E.; Safran, Samuel M.; Vaughn, Lydia Smith; Robinson, A. H. W.; Whipple, Alison; Boyer, Katharyn E.; Drexler, Judith Z.; Naiman, Robert J.; Pinckney, James L.; Howe, Emily; Canuel, Elizabeth A.; Grenier, J. Letitia

doi:10.1016/j.scitotenv.2021.147097

Cited by 19 publications

(38 citation statements)

References 43 publications

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“…The GSW database was produced using a massive number of Landsat images and various data mining techniques (e.g., expert system and visual analytics) [14]. This database provides accurate information about the dynamics of the Earth's surface waters, which has been widely used in hydrological and ecological studies [52][53][54]. Here, we further refined the GSW layers to alleviate the impacts of clouds and scan line failure, using the method of Zhao and Gao [38] (Figure S1).…”

Section: Gsw and Icesat/icesat-2 Data For Estimating Lake Volume Changesmentioning

confidence: 99%

Decadal Lake Volume Changes (2003–2020) and Driving Forces at a Global Scale

et al. 2022

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Lakes play a key role in the global water cycle, providing essential water resources and ecosystem services for humans and wildlife. Quantifying long-term changes in lake volume at a global scale is therefore important to the sustainability of humanity and natural ecosystems. Yet, such an estimate is still unavailable because, unlike lake area, lake volume is three-dimensional, challenging to be estimated consistently across space and time. Here, taking advantage of recent advances in remote sensing technology, especially NASA’s ICESat-2 satellite laser altimeter launched in 2018, we generated monthly volume series from 2003 to 2020 for 9065 lakes worldwide with an area ≥ 10 km2. We found that the total volume of the 9065 lakes increased by 597 km3 (90% confidence interval 239–2618 km3). Validation against in situ measurements showed a correlation coefficient of 0.98, an RMSE (i.e., root mean square error) of 0.57 km3 and a normalized RMSE of 2.6%. In addition, 6753 (74.5%) of the lakes showed an increasing trend in lake volume and were spatially clustered into nine hot spots, most of which are located in sparsely populated high latitudes and the Tibetan Plateau; 2323 (25.5%) of the lakes showed a decreasing trend in lake volume and were clustered into six hot spots—most located in the world’s arid/semi-arid regions where lakes are scarce, but population density is high. Our results uncovered, from a three-dimensional volumetric perspective, spatially uneven lake changes that aggravate the conflict between human demands and lake resources. The situation is likely to intensify given projected higher temperatures in glacier-covered regions and drier climates in arid/semi-arid areas. The 15 hot spots could serve as a blueprint for prioritizing future lake research and conservation efforts.

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Section: Gsw and Icesat/icesat-2 Data For Estimating Lake Volume Changesmentioning

confidence: 99%

Decadal Lake Volume Changes (2003–2020) and Driving Forces at a Global Scale

et al. 2022

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“…comprise most of the total FAV cover, though this may change as two more recently introduced FAV species-Limnobium laevigatum (West Indian spongeplant) and A. philoxeroides-become more established in the Delta. Additional information about historical records of some key SAV species are presented in Boyer et al (this issue) along with how these introductions affected primary production in the estuary (also see Cloern et al 2021).…”

Section: Aquatic Vegetation Communities Of the Deltamentioning

confidence: 99%

“…Aquatic vegetation affects ecosystem processes, physical environments, and food web interactions (Toft et al 2003;Hestir et al 2013Hestir et al , 2016Cloern et al 2021;Boyer et al this issue). In the San Francisco Estuary (the estuary), floating aquatic vegetation (FAV) and submerged aquatic vegetation (SAV) communities have significantly expanded in recent decades as a few nonnative species have substantially increased in abundance and distribution (Khanna et al 2012;Santos et al 2016;Ta et al 2017;Khanna et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Ecology and Ecosystem Impacts of Submerged and Floating Aquatic Vegetation in the Sacramento–San Joaquin Delta

Christman¹,

Khanna²,

Drexler³

et al. 2023

SFEWS

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Substantial increases in non-native aquatic vegetation have occurred in the upper San Francisco Estuary over the last 2 decades, largely from the explosive growth of a few submerged and floating aquatic plant species. Some of these species act as ecosystem engineers by creating conditions that favor their further growth and expansion as well as by modifying habitat for other organisms. Over the last decade, numerous studies have investigated patterns of expansion and turn-over of aquatic vegetation species; effects of vegetation on ecosystem health, water quality, and habitat; and effects of particular species or communities on physical processes such as carbon and sediment dynamics. Taking a synthetic approach to evaluate what has been learned over the last few years has shed light on just how significant aquatic plant species and communities are to ecosystems in the Sacramento-San Joaquin Delta. Aquatic vegetation affects every aspect of the physical and biotic environment, acting as ecosystem engineers on the landscape. Furthermore, their effects are constantly changing across space and time, leaving many unanswered questions about the full effects of aquatic vegetation on Delta ecosystems and what future effects may result, as species shift in distribution and new species are introduced. Remaining knowledge gaps underlie our understanding of aquatic macrophyte effects on Delta ecosystems, including their roles and relationships with respect to nutrients and nutrient cycling, evapotranspiration and water budgets, carbon and sediment, and emerging effects on fish species and their habitats. This paper explores our current understanding of submerged and floating aquatic vegetation (SAV and FAV) ecology with respect to major aquatic plant communities, observed patterns of change, interactions between aquatic vegetation and the physical environment, and how these factors affect ecosystem services and disservices within the upper San Francisco Estuary.

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“…Tidal marsh was a dominant landscape feature in the historic estuary; however, extensive diking, draining, and conversion to agriculture (e.g., farmland, pasture) in the 19th and 20th centuries eliminated up to 98% of tidal marsh area and nearly all associated aquatic primary production (Cloern et al 2021). The remaining tidal marshes are sparsely distributed throughout https://doi.org/10.15447/sfews.2022v20iss2art1…”

Section: Tidal Marshmentioning

confidence: 99%

“…Beyond the suite of management approaches described above, science support is needed to monitor and diagnose climate effects. The central pillar of science support is maintaining core longterm monitoring programs to evaluate changes in ecological processes (Stompe et al 2020;Cloern et al 2021). These long-term changes are different from the current priorities that focus more on daily operational issues such as fish entrainment into water export facilities (Grimaldo et al 2009;USFWS 2019).…”

Section: Science Needsmentioning

confidence: 99%

Climate Change Impacts on San Francisco Estuary Aquatic Ecosystems: A Review

Herbold¹,

Bush²,

Castillo³

et al. 2022

SFEWS

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Climate change is intensifying the effects of multiple interacting stressors on aquatic ecosystems, particularly in estuaries. In the San Francisco Estuary, signals of climate change are apparent in the long-term monitoring record. Here we synthesize current and potential future climate change effects on three main ecosystems (floodplain, tidal marsh, and open water) in the upper estuary and two representative native fishes that commonly occur in these ecosystems (anadromous Chinook Salmon, Oncorhynchus tshawytscha and estuarine resident Sacramento Splittail, Pogonichthys macrolepidotus). Based on our review, we found that the estuary is experiencing shifting baseline environmental conditions, amplification of extremes, and restructuring of physical habitats and biological communities. We present priority topics for research and monitoring, and a conceptual model of how the estuary currently functions in relation to climate variables. In addition, we discuss four tools for management of climate change effects: regulatory, water infrastructure, habitat development, and biological measures. We conclude that adapting to climate change requires fundamental changes in management.

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On the human appropriation of wetland primary production

Cited by 19 publications

References 43 publications

Decadal Lake Volume Changes (2003–2020) and Driving Forces at a Global Scale

Decadal Lake Volume Changes (2003–2020) and Driving Forces at a Global Scale

Ecology and Ecosystem Impacts of Submerged and Floating Aquatic Vegetation in the Sacramento–San Joaquin Delta

Climate Change Impacts on San Francisco Estuary Aquatic Ecosystems: A Review

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