Reeve’s Muntjac (Muntiacus reevesi) Habitat Suitability Under Climate Change Scenarios in Hupingshan National Nature Reserve, China

Animals, Journal Year: 2025, Volume and Issue: 15(2), P. 160 - 160

Published: Jan. 9, 2025

Climate change and human disturbance are critical factors affecting the habitat distribution of wild animals, with implications for management strategies such as protecting migration corridors, restoration, species conservation. In Hupingshan National Nature Reserve (NNR), Reeve’s muntjac (Muntiacus reevesi) is a key prey South China tiger (Panthera tigris amoyensis), which extinct in targeted reintroduction by Chinese government. Thus, understanding abundance essential to ensure survival sustainability reintroduced populations. Despite significant conservation efforts, impacts climate on NNR remain unclear, though these could necessitate adaptive due shifts abundance. this study, we employed an optimized MaxEnt model assess current identify environmental variables influencing muntjac. Assuming non-climatic will constant over next century, projected future under two shared socioeconomic pathways (SSP126 SSP585) mid-century (2050s) late-century (2090s). Comparative analyses areas revealed potential species. outputs classified suitability into high, medium, low levels. Results showed that climatic contributed 35.2% 49.4% suitability, respectively. Under SSP126 scenario, habitats decreased covered 0 km2 2050s, expanding slightly 4.2 2090s, while those increased spanned 491.1 463.2 SSP585 10.2 2050s 431.8 2090s. Habitats were comparatively smaller SSP585, covering 162.0 1.1 These findings suggest projections may support muntjac’s survival, loss 2090s (SSP126). lead fragmentation, raising extinction risks Reeves’s Mitigating effects involve establishing minimizing disturbances, potentially supplementing populations captive-bred prey. Such measures plan help availability remains sufficient sustaining

Language: Английский

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Impact of hyposalinity on the barrens-forming sea urchin Centrostephanus rodgersii in context with flooding events.

Marine Environmental Research, Journal Year: 2025, Volume and Issue: 207, P. 107012 - 107012

Published: Feb. 14, 2025

Language: Английский

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A review of urchin barrens and the longspined sea urchin (Centrostephanus rodgersii) in New South Wales, Australia

Marine and Freshwater Research, Journal Year: 2025, Volume and Issue: 76(5)

Published: March 24, 2025

Context Centrostephanus rodgersii is the most dominant urchin species in south-eastern Australia and primary macroalgal grazer, thus creating maintaining barrens habitat. The role, formation persistence of are common topics interest among academic, industry, Indigenous, conservation government groups. Aims This review focuses on role habitat C. New South Wales (NSW), with an aim to inform debate guide continued inter-jurisdictional management research. Results Over 30 years research shows that occur across NSW coastline, but they tend be larger more numerous along southern coast. have remained stable shallow waters since 1960s, limited earlier data prevent identification longer historical patterns. Climate change predictions show may disappear from northern increase far coast over next 100 years, although this modulated by local thermally acclimated populations. Conclusions indicates presence, seem unique likely warrant different strategies as shifts its distribution.

Language: Английский

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New South Wales rocky reefs are under threat

Marine and Freshwater Research, Journal Year: 2023, Volume and Issue: 74(2), P. 95 - 98

Published: Jan. 18, 2023

Rocky reefs of New South Wales (NSW) are characterised by a mosaic habitats, including kelp forest and urchin-grazed barrens. These habitats support diversity dependent species. Decades research have demonstrated that kelps form extensive forests with distinctive fish invertebrate faunas the ‘barrens’ boulder habitat provides shelter other resources for commercial fishes, charismatic fishes invertebrates; barrens not deserts! The feeding activities herbivorous invertebrates, particularly black sea urchin (Centrostephanus rodgersii) determine presence habitat. Some invertebrates survive only in urchins food many predatory fishes. NSW has been highly stable decades is critical reef-based organisms. Because climate change, Tasmanian waters warmed as result C. rodgersii larvae dispersed southward from NSW. Importantly, situation regarding Tasmania differs established pattern this needs to be recognised approach management species two states. Urchins should appreciated important determiners removal them whatever purpose would managed carefully.

Language: Английский

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Artificial light at night and warming impact grazing rates and gonad index of the sea urchin Centrostephanus rodgersii

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2024, Volume and Issue: 291(2021)

Published: April 17, 2024

Artificial light at night (ALAN) is a growing threat to coastal habitats, and likely exacerbate the impacts of other stressors. Kelp forests are dominant habitats on temperate reefs but declining due ocean warming overgrazing. We tested independent interactive effects ALAN (dark versus ALAN) (ambient warm) grazing rates gonad index sea urchin Centrostephanus rodgersii. Within these treatments, urchins were fed either ‘fresh’ kelp or ‘treated’ kelp. Treated ( Ecklonia radiata ) was exposed same temperature combinations as urchins. assessed photosynthetic yield, carbon nitrogen content C : N ratio treated help identify potential drivers behind any Grazing increased with for fresh kelp, Gonad higher in ALAN/ambient dark/warm treatments compared dark/ambient than ALAN/warm one time point. This indicates may increase pressure rocky reefs, an important finding management strategies.

Language: Английский

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Impacts of Climate Change on Densities of the Urchin Centrostephanus rodgersii Vary among Marine Regions in Eastern Australia

Diversity, Journal Year: 2023, Volume and Issue: 15(3), P. 419 - 419

Published: March 13, 2023

The urchin Centrostephanus rodgersii is expanding its range southward in eastern Australia, which has been associated with negative ecological impacts, including shifts from kelp forests to barrens. However, limited analyses are available that examine the factors influencing abundance and distribution across entirety of this range. Here, we utilise data 13,085 underwater visual census surveys, 1992 2022, develop an density model for C. historical extending geographical We apply whether densities increasing project future by 2100 under IPCC climate scenario RCP 8.5. Significant increases were detected South-east marine region encompasses Tasmania, Victoria, far south coast New South Wales (NSW) over last 30 years. In Temperate East (encompassing Queensland NSW waters 36.6° S), however, no significant observed. Future projections indicated further substantial likely occur reductions most 2100. Importantly, results indicate current changes Australia vary among regions. Therefore, impacts urchins on temperate ecosystems, formation barrens, will also Consequently, management actions need differ these regions, requiring mitigation densities, whereas may preserve declining populations.

Language: Английский

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Searchin' for Urchins: Utilising Museum Collections and Citizen Science to Assess Species on the Move in the Genus Tripneustes

Journal of Biogeography, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 24, 2025

ABSTRACT Aim With the global redistribution of species due to warming, accurately quantifying distributions is critical understanding patterns in biodiversity and range shift trajectories. The genus Tripneustes comprises globally important sea urchin taxa that graze seagrass macroalgae have potential transform ecosystems. In eastern Australia, there are two taxa, tropical T. g. gratilla subtropical‐temperate australiae . temperate distribution was considered be a climate‐driven extension until recent taxonomic clarification. We quantified present future these warming hot spot. Location Eastern Australia Tasman Sea, including Lord Howe Island, Norfolk north New Zealand. Taxon (Echinodermata: Echinoidea: Toxopneustidae). Methods reassessed specimen identifications across four museum collections synthesise data citizen science observations, determining biogeographic realised thermal niches Habitat suitability models were used determine current suitable habitat predict distributional change. Results Whilst has wide tropical‐temperate region from Papua Guinea (9°56′2.4″ S) Jervis Bay (35°7′12″ broad niche (16.3°C–29.97°C), (Byron Bay, 28°37′0.12″ S, Narooma, 36°15′0″ narrower (15.3°C–26°C). densities highest subtropical ecoregions, where co‐occur. modelling indicated narrow‐range specialist will likely undergo poleward by 2100. contrast, generalist appears capable occupying broader conditions. Main Conclusions Despite their similar ecological roles, congeneric contrasting niches, with distinct implications for as ocean warms.

Language: Английский

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Braiding Indigenous oral histories and habitat mapping to understand urchin barrens in southern New South Wales

Marine and Freshwater Research, Journal Year: 2025, Volume and Issue: 76(6)

Published: April 9, 2025

Context The sea urchin (Centrostephanus rodgersii) is linked to barrens and potential kelp forest depletion along New South Wales (NSW) southern coast. Whereas previous studies employed scientific methods evaluate barrens, Indigenous Traditional Knowledges offer valuable insights into population dynamics. Aims This study aimed ‘braid’ with Western science better understand in the region. Methods Yarning circles Walbunja Owners were conducted alongside habitat mapping using image segmentation of remotely sensed imagery. Key results highlighted long-term declines culturally significant species, including snapper (Pagrus auratus), lobster (Jasus edwardsii), groper (Achoerodus viridis), abalone (Haliotis rubra) cuttlefish (Sepia apama). Habitat showed dynamic vegetation cover, although differentiating from other posed challenges. Urchin present across all sites as part a mosaic typical NSW rocky reefs. Conclusions research demonstrated value braiding enhance understanding Implications yarning suggest that utilising Aboriginal Torres Strait Islander perspectives future would improve ecological inform sustainable marine management strategies. Further, has need for higher resolution aerial

Language: Английский

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Live‐fast‐die‐young: Carryover effects of heatwave‐exposed adult urchins on the development of the next generation

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(19), P. 5781 - 5792

Published: Aug. 3, 2022

With rising ocean temperatures, extreme weather events such as marine heatwaves (MHWs) are increasing in frequency and duration, pushing life beyond their physiological limits. The potential to respond conditions through acclimatization, pass on resistance the next generation, fundamentally depends capacity of an organism cope within thermal tolerance To elucidate whether heat conditioning parents could benefit offspring development, we exposed adult sea urchins (Heliocidaris erythrogramma) ambient summer (23°C), moderate (25°C) or strong (26°C) MHW for 10 days. Offspring were then reared at constant temperature along a gradient (22-28°C) development was tracked 14-day juvenile stage. Progeny from MHW-conditioned adults developed metamorphosis faster than those conditioned parents, with most individuals developing larval stage across all temperatures. In contrast, majority control died before temperatures above 25°C (moderate MHW). Juveniles produced also larger largest juveniles 26°C treatment. smallest (current-day summer) (and 22 25°C). Surprisingly, initial survival higher progeny even hotter predicted MHWs (28°C). Importantly, however, there substantial mortality by day 14. Therefore, while carryover effects parental resulted growing, progeny, this will only persist more sensitive enhance if return promptly normal seasonal current

Language: Английский

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Taxa‐dependent temporal trends in the abundance and size of sea urchins in subtropical eastern Australia

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(5)

Published: May 1, 2024

Abstract Subtropical reefs host a dynamic mix of tropical, subtropical, and temperate species that is changing due to shifts in the abundance distribution response ocean warming. In these transitional communities, biogeographic affinity expected predict changes composition, with projected increases tropical declines cool‐affinity species. Understanding population dynamics along transition zones critical, especially for habitat engineers such as sea urchins can facilitate ecosystem through grazing. We investigated on coral‐associated subtropical at 7 sites eastern Australia (28.196° S 30.95° S) over 9 years (2010–2019), period impacted by warming heatwaves. Specifically, we density size structure taxa ( Centrostephanus rodgersii, Phyllacanthus parvispinus ), Tripneustes australiae ) Diadema spp.) affinities. Counter expectation, did not explain abundances this region. Although increase their cold range boundaries, declined across all sites. The T. also showed declines, while populations C. rodgersii were remarkably stable throughout our study period. Our results show temporal patterns urchin region cannot be predicted bio‐geographic alone contribute critical information about important herbivores zone.

Language: Английский

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