Trait-mediated filtering predicts phyllostomid bat responses to habitat disturbance in the Orinoco Llanos

Biodiversity and Conservation, Год журнала: 2024, Номер 33(4), С. 1285 - 1302

Опубликована: Март 1, 2024

Язык: Английский

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Assessing ecosystem integrity in protected areas: A systematic review of methods and applications

Biological Conservation, Год журнала: 2025, Номер 305, С. 111057 - 111057

Опубликована: Март 9, 2025

Язык: Английский

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Simulating animal movement trajectories from temporally dynamic step selection functions

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Март 21, 2024

Abstract Understanding and predicting animal movement is fundamental to ecology conservation management. Models that estimate then predict habitat selection parameters underpin diverse applications, from mitigating invasive species spread enhancing landscape connectivity. However, many predictive models overlook fine-scale temporal dynamics within their predictions, despite animals often displaying behavioural variability might significantly alter movement, distribution over time. Incorporating dynamics, such as circadian rhythms, reduce the averaging out of behaviours, thereby our ability make predictions in both short long term. We tested whether inclusion improved (hourly) long-term (seasonal) spatial for a significant Northern Australia, water buffalo ( Bubalus bubalis ). Water require intensive management actions vast, remote areas display distinct rhythms linked use. To inform operations we generated hourly dry season prediction maps by simulating trajectories static temporally dynamic step functions (SSFs) were fitted GPS data 13 buffalo. found simulations replicated buffalo’s crepuscular patterns selection, resulting more informative accurate predictions. Additionally, when aggregated into better able highlight concentrated use indicate high-risk environmental damage. Our findings emphasise importance incorporating with clear patterns. By integrating processes trajectories, demonstrate an approach can enhance strategies deepen understanding ecological across multiple timescales.

Язык: Английский

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Multiple dimensions of phyllostomid bat biodiversity across ecosystems of the Orinoco Llanos

Animal Conservation, Год журнала: 2024, Номер 27(5), С. 659 - 670

Опубликована: Апрель 23, 2024

Abstract Understanding the impacts of habitat conversion on species assemblages across multiple biodiversity dimensions (taxonomic, functional, and phylogenetic) spatial scales is pivotal for implementing effective conservation strategies. Here, we surveyed phyllostomid bats using mist nets in riparian unflooded forests, flooded savannahs, conventional rice fields to investigate how changes quality affect multifaceted diversity from two Colombian farming systems Orinoco Llanos: traditional farmlands with high‐intensity agriculture (mainly production) Civil Society Nature Reserves greater ecosystem protection. We used a unified framework based Hill numbers quantifying bat taxonomic, phylogenetic modeled relationship these facets landscape variables (habitat cover patch density) three (0.5, 1.5, 3 km) Bayesian generalized linear mixed‐effect models. Our results indicate that increasing human activity toward monocultures representative negatively affected all facets. In contrast, forested habitats associated mainly forests within private reserves contained higher than savannahs fields. However, differences between crops were significant only diversity, indicating loss evolutionary history after conversion. At scale, forest was predictor functional (0.5‐ 3‐km scale) (0.5 km), responded at scale density perspective. Increasing through preserving patches should minimize harmful effects multidimensional biodiversity. Furthermore, creation more wildlife‐friendly farming, as practiced reserves, be prioritized ensure high levels countryside landscapes.

Язык: Английский

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Research trends and knowledge gaps in the ecology of dung beetles (Coleoptera: Scarabaeidae) in savannas

Annals of the Entomological Society of America, Год журнала: 2024, Номер 117(4), С. 209 - 219

Опубликована: Июнь 20, 2024

Abstract Savannas are recognized as one of the world’s most biodiverse ecosystems. However, these environments have highest rates habitat loss due to land use and climate-induced alterations in fire regimes. The combination threats, along with knowledge gaps biodiversity, represents formidable challenges conservation efforts regions. Dung beetles, vital for comprehending impact on savannas, yet undergo comprehensive study. To address this gap, we conducted a systematic review current state regarding dung beetles distributed savannas within Neotropical, Afrotropical, Australasia zoogeographic We describe encompassing geographical distribution, research topics, studied habitats, key metrics assessed existing studies. Our results reveal pronounced focus Neotropical highlighting substantial deficit beetle ecology Afro-tropical Australasian savannas. Most articles focused savanna grasslands, woodlands, human-introduced habitats such pastures. predominant community patterns, replacement, degradation. Noteworthy included abundance, richness, species composition. Diversity indexes functional diversity were also relatively well-explored metrics. across all regions, aspects behavior, reproductive biology, physiology remain inadequately explored. In conclusion, urgent imperative, emphasizing need metrics, including biomass, morphometrics, ecological functions advance our understanding their significance roles

Язык: Английский

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Balancing livestock production and environmental outcomes in northern Australia’s tropical savanna under global change

Environmental Research Letters, Год журнала: 2024, Номер 19(10), С. 104014 - 104014

Опубликована: Авг. 30, 2024

Abstract Livestock production is an integral part of the global food system and livelihoods local people, but it also raises questions environmental sustainability due to issues such as greenhouse gas (GHG) emissions, biodiversity decline, land degradation, water use. Further challenges extensive livestock systems may arise from changes in climate economy (particularly variation prices for carbon). However, significant potential exists both mitigating these impacts adapting change via altering stocking rates, managing fire, supplementing cattle diets reduce methane emissions. We developed integrated, spatio-temporal modelling approach assess effectiveness options management northern Australia’s tropical savanna under different scenarios. Performance was measured against a range indicators, including (GHG biodiversity, intake, condition) agricultural (profit, beef production) outcomes. Our model shows that maintaining historical rates not environmentally sustainable accelerated degradation exacerbated by changing climate. planned early dry season burning substantially reduced our simulations profitable all scenarios included carbon price. Overall, balance between outcomes could be improved below modelled carrying capacity implementing fire management. This scenario most (more than double profit rates), prevented GHG emissions 23%. By integrating cumulative change, external economic drivers, actions across we show future rangelands savannas has

Язык: Английский

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Savanna Biomass for Cosmetics Sources

Опубликована: Янв. 1, 2024

Язык: Английский

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Riffle algal and macroinvertebrate recovery from wet‐season flood disturbance in a tropical savannah river, Northern Australia

Ecohydrology, Год журнала: 2024, Номер 17(2)

Опубликована: Янв. 29, 2024

Abstract Succession occurs when river biota recovers from the loss of biomass and diversity caused by flood disturbance, has rarely been examined in tropical savannah biome. Hypotheses are tested which address environmental context recovery riffle macroinvertebrates an Australian perennial, river, located a catchment with low anthropogenic impact. Recovery occurred over 32‐week dry‐season period gradually declining discharge near‐stable water quality, after 23‐week wet‐season flood‐disturbance period, was typical river's flow regime. Prolonged, benign conditions during facilitated accrual macroalgae. Macroinvertebrate abundance, mediated macroalgal biomass, increased at logarithmic, asymptotic rate period. assemblages functional feeding groups (FFGs) tended to become more similar between consecutive sample dates as progressed, though variable abundances core taxa (Orthocladiinae, Hydropsychidae, Orthotrichia , Chironominae Pyralidae) prominence Hydroptila late Filterer fluctuated most, whilst relative abundance herbivorous shredders predators generally increased. The return macroinvertebrate its pre‐disturbance state is attributed pre‐ post‐disturbance conditions. broadly agreed secondary succession paradigm for macroinvertebrates. probably driven mainly biotic factors, initial colonisation However, this requires elucidation expansion current benthic disturbance population dynamics under abiotic

Язык: Английский

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Predicting fine‐scale distributions and emergent spatiotemporal patterns from temporally dynamic step selection simulations

Ecography, Год журнала: 2024, Номер unknown

Опубликована: Дек. 12, 2024

Understanding and predicting animal movement is fundamental to ecology conservation management. Models that estimate then predict habitat selection parameters underpin diverse applications, from mitigating invasive species spread enhancing landscape connectivity. However, many predictive models overlook fine‐scale temporal dynamics within their predictions, despite animals often displaying behavioural variability might significantly alter movement, distribution over time. Incorporating dynamics, such as circadian rhythms, reduce the averaging out of behaviours, thereby our ability make predictions in both short long term. We tested whether inclusion improved (hourly) long‐term (seasonal) spatial for a significant northern Australia, water buffalo Bubalus bubalis . Water require intensive management actions vast, remote areas display distinct rhythms linked use. To inform operations we generated hourly dry season prediction maps by simulating trajectories static temporally dynamic step functions (SSFs) were fitted GPS data 13 buffalo. found simulations replicated crepuscular patterns selection, resulting more informative accurate predictions. Additionally, when aggregated into better able highlight concentrated use indicate high‐risk environmental damage. Our findings emphasise importance incorporating with clear patterns. By integrating processes trajectories, demonstrate an approach can enhance strategies deepen understanding ecological across multiple timescales. Keywords: circadian, harmonics, landscape‐scale distributions, simulated

Язык: Английский

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Balancing production and environmental outcomes in Australia’s tropical savanna under global change

Опубликована: Фев. 9, 2024

Livestock production is an integral part of the global food system and livelihoods local people, but it also raises issues environmental sustainability due to such as greenhouse gas (GHG) emissions, biodiversity decline, land degradation, water use. Further challenges social extensive livestock systems may arise from changes in climate economy (e.g., changing demand carbon prices). However, significant potential exists for both mitigating these impacts adapting change via altering stocking rates, managing fire, improving pastures, supplementing cattle reduce methane emissions. We developed integrated, spatio-temporal modelling approach assess effectiveness different options management Australia’s tropical savanna under scenarios. Performance was measured against a range indicators, including outcomes (GHG biodiversity, intake, condition) (profit, beef production). find that maintaining baseline rates not environmentally sustainable accelerated degradation exacerbated by climate. Alternatively, planned early dry season burning resulted substantial emissions reductions, our simulations became profitable all scenarios included price. Although there were no perfect win-wins, balance between could be improved at modelled carrying capacity implementing fire management. This scenario most (with four-fold increase historic baseline), prevented reduced GHG 15%. As likely Australia elsewhere, opportunity diversify income streams prove vital

Язык: Английский

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