P. Keith results 341
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Motivation The database initiated by the Mountain Invasion Research Network (MIREN) is one of the few globally implemented standardized vegetation surveys in mountains. The focus is on collecting plant species occurrences at 5‐year intervals along and adjacent to mountain roads spanning elevational gradients, with the goal of providing critical information about the ongoing spread of non‐native plants and the potential impacts...
Bonamia ostreae in New Zealand: Lessons From a Decade‐Long Marine Biosecurity ResponseNARA Subscribed
When Bonamia ostreae (Haplosporidia) was first detected in New Zealand flat oysters ( Ostrea chilensis ) in 2015, it threatened one of the world's largest remaining wild flat oyster fisheries in Foveaux Strait and a developing aquaculture sector. Following the subsequent spread of the parasite within New Zealand from the index site (Marlborough Sounds) to Big Glory Bay, Stewart Island, directly adjacent to Foveaux Strait, New...
Quantifying the Viscoelastic Properties of Pancreatic Tissue: A Comparative Study of Human, Porcine and Engineered HydrogelNARA Subscribed
Pancreatoduodenectomy (PD) is among the most complex abdominal procedures, with a leak from the pancreatic anastomosis (postoperative pancreatic fistula, POPF) continuing to be a major source of morbidity and mortality. The mechanical characteristics of the pancreas, particularly tissue texture, are closely linked to POPF risk, yet remain poorly defined, limiting the accuracy of currently available training models. This study...
Exposure to chemical pollutants can alter the rate and genome‐wide distribution of germline mutations. However, studies measuring the effects of chemical exposure on mutation rates and spectra have not considered the ecological and evolutionary backgrounds of the studied genotypes, which could influence the rates and patterns of germline mutations in altered environments, for example, chemical pollution. Utilising a study of n...
Delta Wing‐Shaped Upper Jaw as a Control Surface to Stabilize Rorqual Whales During Lunge‐FeedingNARA Subscribed
During lunge feeding, rorquals depress their lower jaw to fill the buccal pouch, which can produce a downward pitch on the body from a drag force below the center of mass. It is hypothesized that without flippers the raised upper jaw could produce a counteracting lift to trim the body. Upper jaws of the blue whale and humpback whale have triangular shapes that resemble delta wings. Such wings generate lift without stalling at...
SNAPSHOT USA 2024: Year 6 of the Coordinated National Camera Trap Survey of the United StatesNARA Subscribed
Motivation SNAPSHOT USA is an annual, multi‐contributor camera trap survey of mammals across the United States. The growing SNAPSHOT USA dataset is intended for tracking the spatial and temporal responses of mammal populations to changes in land use, land cover and climate. These data will be useful for exploring the drivers of spatial and temporal changes in relative abundance and distribution, as well as the impacts of speci...
Marine megafauna species are affected by a wide range of anthropogenic threats. To evaluate the risk of such threats, species’ vulnerability to each threat must first be determined. We build on the existing threats classification scheme and ranking system of the International Union for Conservation of Nature (IUCN) Red List of Threatened Species by assessing the vulnerability of 256 marine megafauna species to 23 at‐sea threat...
Cameroon Blackbelly sheep are a domestic breed of hair sheep from West/Central Africa. They are popular with small‐holder farmers in Cameroon as they are highly resilient to local environmental challenges and are prolific a‐seasonal breeders. The aim of this study was to characterise the genetics of Cameroon Blackbelly sheep in relation to global sheep populations and to investigate their relationship to Caribbean hair sheep....
Predictions of southern migration timing in coastal sharks under future ocean warmingNARA Subscribed
Projected redistribution of marine species due to ocean warming may undermine current conservation efforts. Yet, there have been few studies on how ocean warming may alter migration timing. Across 5 years of acoustic telemetry data (2018–2022), we determined environmental drivers of southward migration timing for 6 migratory shark species from summer habitats in the Northwest Atlantic Ocean. We then forecasted how migratory ti...
Global Homogenisation of Plant Communities Along Mountain Roads by Non‐Native Species Despite Mixed Effects at Smaller ScalesNARA Subscribed
Aim Mountain ecosystems are experiencing increased invasion of non‐native plants. These increases in non‐native species put mountains at risk of biotic homogenisation and a reduction of biodiversity. Our study aims to test if non‐native plant species are contributing to biotic homogenisation along roadways in mountain regions and how this changes along elevation gradients and across spatial scales. Location 18 globally distrib...
Limited responses of lizard assemblages to experimental fire regimes in an Australian tropical savannaNARA Subscribed
Disturbance is fundamental to ecosystem dynamics, and its management is foundational to effective ecosystem management for the conservation of biodiversity. Fire is a key agent of disturbance influencing faunal communities in many terrestrial ecosystems, and it underpins the conservation management of fire‐prone ecosystems. However, we have a limited understanding of how faunal communities in fire‐prone ecosystems respond to v...