Response of herbivore functional groups to sequential perturbations in Moorea, French Polynesia

Coral Reefs, Journal Year: 2016, Volume and Issue: 35(3), P. 999 - 1009

Published: Feb. 24, 2016

Language: Английский

---

Ecological indicators for coral reef fisheries management

Fish and Fisheries, Journal Year: 2016, Volume and Issue: 17(4), P. 1029 - 1054

Published: March 9, 2016

Abstract Coral reef fisheries are of great importance both economically and for food security, but many reefs showing evidence overfishing, with significant ecosystem‐level consequences condition. In response, ecological indicators have been developed to assess the state their broader impacts. To date, use coral has rather piecemeal, no overarching understanding performance respect highlighting fishing effects. Here, we provide a review multispecies fishery‐independent used evaluate impacts on reefs. We investigate consistency which highlight effects then address questions statistical power uncertainty, type gradient, scale analysis, influence other variables need more work set reference points empirical, fisheries‐independent Our provides knowledge that will help underpin assessment fishing, offering essential support development implementation management plans.

Language: Английский

---

Sediment addition drives declines in algal turf yield to herbivorous coral reef fishes: implications for reefs and reef fisheries

Coral Reefs, Journal Year: 2018, Volume and Issue: 37(3), P. 929 - 937

Published: Aug. 3, 2018

Language: Английский

---

Habitat and fishing control grazing potential on coral reefs

Functional Ecology, Journal Year: 2019, Volume and Issue: 34(1), P. 240 - 251

Published: Sept. 18, 2019

Abstract Herbivory is a key process on coral reefs, which, through grazing of algae, can help sustain coral‐dominated states frequently disturbed reefs and reverse macroalgal regime shifts degraded ones. Our understanding herbivory largely founded feeding observations at small spatial scales, yet the biomass structure herbivore populations more closely linked to processes which be highly variable across large areas, such as benthic habitat turnover fishing pressure. Though our spatiotemporal variation in grazer well developed, equivalent macroscale approaches bottom‐up top‐down controls are lacking. Here, we integrate underwater survey data fish abundances from four Indo‐Pacific island regions with estimate rates for two functions, cropping (which turf algae) scraping promotes settlement by clearing substrate), 72 reefs. By including range reef states, algal dominance heavily fished remote wilderness evaluate influences assemblages. Cropping were primarily influenced condition, maximized structurally complex high substratum availability low cover. Fishing was primary driver function, depleted most relative remote, unfished though did increase structural complexity. Ultimately, conditions functioning their effect biomass, tightly correlated rates. For given level show that higher dominated small‐bodied fishes, suggesting pressure greatest when size truncated. Stressors cause declines clear substrate algae will likely stimulate increases rates, both protected areas. In contrast, functions already impaired inhabited people, particularly where complexity has collapsed, indicating restoration these require scraper rebuilt towards levels. A free Plain Language Summary found within Supporting Information this article.

Language: Английский

---

Fishing for Resilience

Transactions of the American Fisheries Society, Journal Year: 2014, Volume and Issue: 143(2), P. 467 - 478

Published: March 1, 2014

Abstract Management approaches that focus on social–ecological systems—systems comprised of ecosystems, landscapes, and humans—are needed to secure the sustainability inland recreational fisheries without jeopardizing integrity underlying social ecological components. Resilience management can be useful because it focuses providing capacity for fishermen under a variety conditions while assuring system is not pushed critical threshold would result in new, undesired regime. based perspective accounts possible regimes could manifest. It aims enhance properties allow continued maintenance desired regime which multiple goods services, including capacity, are provided. In this forum paper, we provide an overview potential resilience approach highlight scientific administrative challenges its successful implementation.

Language: Английский

---

Global tropical reef fish richness could decline by around half if corals are lost

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2021, Volume and Issue: 288(1953)

Published: June 30, 2021

Reef fishes are a treasured part of marine biodiversity, and also provide needed protein for many millions people. Although most reef might survive projected increases in ocean temperatures, corals less tolerant. A few fish species strictly depend on food shelter, suggesting that coral extinctions could lead to some secondary extinctions. However, extend far beyond those coral-dependent species. Furthermore, it is yet unknown how such declines vary around the world. Current mass mortalities led us ask communities would respond loss within across oceans. We mapped 6964 coral-reef-fish 119 genera, then regressed reef-fish richness against generic at 1° scale (after controlling biogeographic factors drive diversification). Consistent with small-scale studies, statistical extrapolations suggested local globe be half its current value hypothetical world without coral, leading more areas low or intermediate fewer diversity hotspots.

Language: Английский

---

Ecological dependencies make remote reef fish communities most vulnerable to coral loss

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: Dec. 14, 2021

Abstract Ecosystems face both local hazards, such as over-exploitation, and global climate change. Since the impact of hazards attenuates with distance from humans, extinction risk should decrease remoteness, making faraway areas safe havens for biodiversity. However, isolation reduced anthropogenic disturbance may increase ecological specialization in remote communities, hence their vulnerability to secondary effects diversity loss propagating through networks interacting species. We show this be true reef fish communities across globe. An fish-coral dependency coral reefs human settlements, paired far-reaching impacts increases species loss, counteracting benefits remoteness. Hotspots are distinct those caused by direct impacts, increasing number hotspots ~30% globally. These findings might apply other ecosystems on Earth depict a world where no place, matter how remote, is biodiversity, calling reconsideration conservation priorities.

Language: Английский

---

Fish Community Resource Utilization Reveals Benthic–Pelagic Trophic Coupling Along Depth Gradients in the Beibu Gulf, South China Sea

Biology, Journal Year: 2025, Volume and Issue: 14(2), P. 207 - 207

Published: Feb. 16, 2025

Benthic-pelagic coupling is a key approach to studying the structure and energy dynamics of shallow marine food webs. The movement foraging patterns consumers are major drivers nutrient distribution in ecosystems critical for maintaining ecosystem stability. To better understand between coastal habitats, this study employed Bayesian mixture model using SC SI data. By classifying functional groups based on taxonomy, morphological traits, feeding ecology similarities, we constructed trophic network analyzed changes fish benthic-pelagic across environmental gradients. results show that primary carbon sources Beibu Gulf phytoplankton, particulate organic matter (POM), sediment (SOM), with phytoplankton contributing most. Pelagic subsidies dominate web. Small sized, abundant planktivorous benthivorous act both as predators important prey, transferring derived from benthic pelagic zones higher trophic-levels. Larger, higher-trophic-level piscivorous serve couplers, preying organisms various habitats. Depth chlorophyll-a (Chl-a) two variables influencing fish, opposite gradient observed each. Along depth gradient, exhibit clear adaptive strategies. As water increases, tend forage more within their specific habitat (either or pelagic), prey types continually changing, leading gradual reduction strength coupling. This reveals spatial resource utilization strategies Gulf, providing deeper insights into variation It also enhances our understanding responses human pressures global changes, offering valuable perspectives predicting these responses.

Language: Английский

---

A Busse Balloon in the Lagoon: Herbivore Behaviour Generates Spatial Patterns in Coral Reef Ecosystems

Ecology Letters, Journal Year: 2025, Volume and Issue: 28(3)

Published: March 1, 2025

ABSTRACT Spatial processes, particularly scale‐dependent feedbacks, may play important and underappreciated roles in the dynamics of bistable ecosystems. For example, self‐organised spatial patterns can allow for stable coexistence alternative states outside regions bistability, a phenomenon known as Busse balloon. We used partial differential equations to explore potential such coral reefs, focusing on how herbivore behaviour mobility affect stability coral‐ macroalgal‐dominated states. Herbivore attraction resulted balloon that enhanced macroalgal resilience, with persisting parameter space where nonspatial models predict uniform dominance. Thus, our work suggests association (e.g., shelter) prevent reefs from reaching fully coral‐dominated state. More broadly, this study illustrates consumer use ecosystems undergoing wholesale state transitions, highlighting importance explicitly accounting when studying systems.

Language: Английский

---

Movement of adult temperate reef fishes off the west coast of North America

Canadian Journal of Fisheries and Aquatic Sciences, Journal Year: 2012, Volume and Issue: 69(8), P. 1362 - 1374

Published: July 30, 2012

Movement of reef fishes has important consequences for the demography, spatial structure, and connectivity their populations conservation management. I synthesized analyzed available data on movement adult temperate along west coast North America to summarize our current knowledge identify future research needs. For 80% species, 75th percentile distance was less than 1.5 km. distances examined species are characterized by positively skewed frequency distributions discrete ranges rather unbounded diffusive or directional movement. There is no relationship between body size distance, but shallower living move much shorter deeper dwelling fishes. Such limited suggests that ecological neighborhoods individuals small, finite will have understanding modeling population in management contexts. Future should focus effects habitat heterogeneity parameters investigate variability patterns its species’ ecology

Language: Английский

---