Anna Koester

ORCID: 0000-0003-0183-4907
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About
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Research Areas
  • Coral and Marine Ecosystems Studies
  • Marine and fisheries research
  • Marine and coastal plant biology
  • Marine Biology and Ecology Research
  • Coastal and Marine Management
  • Ichthyology and Marine Biology
  • Aquatic Invertebrate Ecology and Behavior
  • Marine animal studies overview
  • Turtle Biology and Conservation

University of Seychelles
2023-2025

Island Conservation Society
2024

University of Bremen
2020-2023

Coral reefs are exceptionally biodiverse ecosystems and their integrity is paramount for coastal societies. Nevertheless, coral experience significant local global anthropogenic pressures, provide a sensitive indicator of ocean health climate change. Reef monitoring programmes have therefore become standard tool to track changes within these essential better inform science, management policy.Aldabra Atoll UNESCO World Heritage Site in Seychelles, one the world's most secluded ecoregions...

10.5194/oos2025-511 preprint EN 2025-03-25

Abstract Documenting post-bleaching trajectories of coral reef communities is crucial to understand their resilience climate change. We investigated community changes following the 2015/16 bleaching event at Aldabra Atoll, where direct human impact minimal. combined benthic data collected pre- (2014) and (2016–2019) 12 sites across three locations (lagoon, 2 m depth; seaward west east, 5 15 depth) with water temperature measurements. While reefs experienced relative hard reductions 51–62%,...

10.1038/s41598-020-74077-x article EN cc-by Scientific Reports 2020-10-12

Tropical deep reefs (>30 m) are biologically and ecologically unique ecosystems with a higher geographic reach to shallow (<30 reefs. Yet they poorly understood rarely considered in conservation practices. Here, we characterise benthic fish communities across depth gradient (10-350 remote coral atolls Seychelles, Western Indian Ocean. Using taxonomic trait-based approaches present the functional composition of reef communities, distinct traits dominating different depths. Depth-related...

10.1016/j.scitotenv.2023.162111 article EN cc-by The Science of The Total Environment 2023-02-09

Coral recruitment and successive growth are essential for post-disturbance reef recovery. As coral recruit juvenile abundances vary across locations under different environmental regimes, their assessment at remote, undisturbed reefs improves our understanding of early life stage dynamics corals. Here, we first explored changes in abundance three (lagoon, seaward west east) remote Aldabra Atoll (Seychelles) between 2015 2019, which spanned the 2015/16 global bleaching event. Secondly,...

10.1371/journal.pone.0260516 article EN cc-by PLoS ONE 2021-12-07

Introduction Coral bleaching immediately impacts the reef benthos, but effects on fish communities are less well understood because they often delayed and confounded by anthropogenic interactions. Methods We assessed changes in abundance, biomass community composition before after 2015/16 coral event at Aldabra Atoll, Seychelles, where local human minimal, reefs suffered 50% bleaching-induced mortality. monitored 12 shallow (2–5 m water depth) nine deep (15 permanent survey sites using two...

10.3389/fmars.2023.1230717 article EN cc-by Frontiers in Marine Science 2023-09-25

Abstract Many coastal ecosystems, such as coral reefs and seagrass meadows, currently experience overgrowth by fleshy algae due to the interplay of local global stressors. This is usually accompanied strong decreases in habitat complexity biodiversity. Recently, persistent, mat-forming red algae, previously described for Black Sea several Atlantic locations, have also been observed Mediterranean. These centimetre high mats may displace meadows invertebrate communities, potentially causing a...

10.1038/s42003-022-03523-5 article EN cc-by Communications Biology 2022-06-13

Tropical deeper reefs (>30 m) are biologically unique ecosystems with a comparable geographic reach to shallow reefs. Yet they poorly understood, and rarely considered in conservation practices. Here, we characterise benthic fish communities across depth gradient (10‒350 remote coral atolls Seychelles, Western Indian Ocean. Using taxonomic trait-based approaches present the biological functional diversity of reef communities, distinct traits dominating different depths. Depth-related changes...

10.2139/ssrn.4121008 article EN SSRN Electronic Journal 2022-01-01

Using stable isotope analysis of carbon and nitrogen turtle tissues putative prey items, we investigated the diet immature green turtles hawksbill foraging in lagoon Aldabra Atoll, a relatively undisturbed atoll southern Seychelles. offers unique environment for understanding sea ecology. Green mostly consumed seagrass brown algae while mainly mangroves invertebrates. showed dietary shift with size (a proxy age). There was minimal niche overlap between species evidence small-scale site...

10.1016/j.marenvres.2024.106529 article EN cc-by-nc-nd Marine Environmental Research 2024-04-28

<title>Abstract</title> Managing coral reefs to maintain ecosystem function and maximise resilience requires identification of indicators clear ecological reference thresholds for reef managers or aim for. In the absence local resilience-based targets, can conduct local-scale assessments by collecting data on comparing them recently established broadscale which have been defined incorporating large spatial variability. This study documents application these threshold approaches kick-start...

10.21203/rs.3.rs-4867751/v1 preprint EN Research Square (Research Square) 2024-09-11
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