National Center for Ecological Analysis and Synthesis

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2051-2060 of 6311
  1. Publication

    Fishing, environment, and the erosion of a population portfolio

    Many organisms exhibit tremendousfluctuations in population abundance and experienceunexpected collapse. Conservationists seeking to minimize region-wide variability in resources and reduceextinction risk often seek to preserve a metapopulation portfolio of spatially asynchronous subpopulationsconnected by dispersal. However, portfolio properties are not necessarily static, and the erosion of a portfo-lio can fundamentally alter the population dynamics and services a species provides.

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  2. Publication

    Postwar wildlife recovery in an African savanna:evaluating patterns and drivers of species occupancy andrichness

    As local and global disturbances reshape African savannas, an understanding ofhow animal communities recover and respond to landscape features can informconservation and restoration. Here, we explored the spatial ecology of a wildlifecommunity in Gorongosa National Park, Mozambique, where conservation effortshave fostered the recovery of large mammal populations after their near-extirpationduring Mozambique’s civil war.

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  3. Publication

    Early effects of COVID-19 on US fisheries and seafood consumption

    The US seafood sector is susceptible to shocks, both because of the seasonal nature of many of its domestic fisheries and its global position as a top importer and exporter of seafood. However, many data sets that could inform science and policy during an emerging event do not exist or are only released months or years later. Here, we syn-thesize multiple data sources from across the seafood supply chain, including uncon-ventional real-time data sets, to show the relative initial responses and indicators of recovery during the COVID-19 pandemic.

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  4. Publication

    Scalable mapping and monitoring of Mediterranean-climate oak landscapes with temporal mixture models

    Mediterranean-climate oak woodlands are prized for their biodiversity, aesthetics, and ecosystem services. Conservation and maintenance of these landscapes requires accurate observations of both present and historic conditions capable of spanning millions of hectares. Decameter optical satellite image time series have the observational coverage to meet this need, with almost 40 years of intercalibrated global observations from the Landsat program alone. However, the optimal approach to leverage these observations for oak ecosystem monitoring remains elusive.

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  5. Publication

    Feedbacks from human health to household reliance on natural resources during the COVID-19 pandemic

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  6. Publication

    Ecological impacts of human-induced animal behaviour change

    A growing body of literature has documented myriad effects of human activities on animal behaviour, yet the ultimate ecological consequences of these behavioural shifts remain largely uninves tigated. While it is understood that, in the absence of humans, variation in animal behaviour can have cascading effects on species interactions, community structure and ecosystem function, we know little about whether the type or magnitude of human-induced behavioural shifts translate into detectable ecological change.

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  7. Publication

    An applied ecology of fear framework: linking theory to conservation practice

    Research on the ecology of fear has highlighted the importance of perceived risk from predators and humans in shaping animal behavior and physiology, with potential demographic and ecosystem-wide consequences. Despite recent conceptual advances and potential management implications of the ecology of fear, theory and conservation practices have rarely been linked. Many challenges in animal conservation may be alleviated by actively harnessing or compensating for risk perception and risk avoidance behavior in wild animal populations.

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  8. Publication

    Identifying management actions that promote sustainable fisheries

    Which management actions work best to prevent or halt overfishing and to rebuild depleted populations? A comprehensive evaluation of multiple, co-occurring management actions on the sustainability status of marine populations has been lacking. Here we compiled detailed management histories for 288 assessed fisheries from around the world (accounting for 45% of those with formal stock assessments) and used hierarchical time-series analyses to estimate effects of different management interventions on trends in stock status.

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  9. Publication

    Quantifying the frequency of synchronous carbon and nitrogen export to the river network

    The biogeochemical cycles of carbon (C) and nitrogen (N) are inextricably linked for a range of reactions. For coupled reactions such as denitrification to occur, however, solutes must be found together in space and time. Using the framework of concentration-discharge (c-Q) relationships, we examine the frequency of synchronous C and N export (i.e. identical c-Q behavior) across a river network using > 5 years of high-frequency sensor data. We demonstrate that across space and time the export of C and N to a river network is asynchronous 57% of the time.

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  10. Publication

    The voices of youth in envisioning positive futuresfor nature and people

    The unpredictable Anthropocene poses the challenge of imagining a radically different, equitable and sustainable world. Looking 100 years ahead is not easy, and especially as millennials, it appears quite bleak. This paper is the outcome of a visioning exercise carried out in a 2-day workshop, attended by 33 young early career professionals under the auspices of IPBES. The process used Nature Futures Framework in an adapted visioning method from the Seeds of Good Anthropocene project.

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