D.R. Mackenzie results 33
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Stony coral tissue loss disease (SCTLD) has spread throughout Florida’s Coral Reef, causing extensive mortality of over 30 species of reef-building corals, and has rapidly spread to many other countries and territories throughout the Caribbean. Current treatments for SCTLD, including a proprietary paste mixed with the antibiotic amoxicillin, do not provide protection from future infections and may select for antibiotic-resista...
Best practices for collecting and preserving marine mammal biological samples in the ‘omics eraNARA Subscribed
The recent rise of ‘omics and other molecular research technologies alongside improved techniques for tissue preservation have broadened the scope of marine mammal research. Collecting biological samples from wild marine mammals is both logistically challenging and expensive. To enhance the power of marine mammal research, great effort has been made in both the field and the laboratory to ensure the scientific integrity of sam...
Are chlorophyll concentrations and nitrogen across the vertical canopy profile affected by elevated CO2 in mature Quercus trees?NARA Subscribed
Key message In mature Q. robur, chlorophyll varied with season and canopy height, whilst eCO 2 -driven changes were consistent with M area, highlighting key factors for consideration when scaling photosynthetic processes and canopy N-use. Nitrogen-rich chlorophyll and carotenoid pigments are important in photosynthetic functioning. Photosynthetic pigments have been found to decrease with elevated CO 2 (eCO 2 ), but few such st...
Aim Existing abiotic and biotic threats to plant species (e.g., disease, drought, invasive species) affect their capacity to recover post‐fire. We use a new, globally applicable framework to assess the vulnerability of 26,062 Australian plant species to a suite of active threats after the 2019–2020 fires. Location Australia. Time period 2019–2020. Major species studied Plants. Methods Spatial data for existing threats and info...
Global maps of soil temperatureNARA Subscribed
Research in global change ecology relies heavily on global climatic grids derived from estimates of air temperature in open areas at around 2 m above the ground. These climatic grids do not reflect conditions below vegetation canopies and near the ground surface, where critical ecosystem functions occur and most terrestrial species reside. Here, we provide global maps of soil temperature and bioclimatic variables at a 1‐km 2 r...
Macroecological patterns of forest structure and allometric scaling in mangrove forestsNARA Subscribed
Aim Mangrove wetlands span broad geographical gradients, resulting in functionally diverse tree communities. We asked whether latitudinal variation, allometric scaling relationships and species composition influence mangrove forest structure and biomass allocation across biogeographical regions and distinct coastal morphologies. Location Global. Time period Present. Major taxa studied Mangrove ecosystems. Methods We built the...
Something old, something new: Historical perspectives provide lessons for blue growth agendasNARA Subscribed
The concept of “blue growth,” which aims to promote the growth of ocean economies while holistically managing marine socioecological systems, is emerging within national and international marine policy. The concept is often promoted as being novel; however, we show that historical analogies exist that can provide insights for contemporary planning and implementation of blue growth. Using a case‐study approach based on expert k...
Risk assessment of the use of alternative animal and plant raw material resources in aquaculture feedsNARA Subscribed
A wide range of raw materials are now used routinely in aquaculture feeds throughout the world, primarily to supply protein and energy in the form of lipid from edible oils. Protein meals and oils used can generally be divided into those of plant or animal origin and many have considerable potential to supply the required dietary nutrients required by aquaculture species. However, the use of any raw material introduces a suite...
Insights into the life history and ecology of a large shortfin mako shark Isurus oxyrinchus captured in southern CaliforniaNARA Subscribed
In June 2013, a record‐breaking female Isurus oxyrinchus (total length 373 cm, mass 600 kg) was captured by rod and reel off Huntington Beach, California, where it was subsequently donated to research and provided a rare opportunity to collect the first data for a female I. oxyrinchus of this size. Counts of vertebral band pairs estimate the shark to have been c. 22 years old, depending upon assumptions of band‐pair deposition...
Fish are becoming an increasingly important research species as investigators seek alternatives to mammalian models. Combined positron emission tomography/computed tomography with 18 F‐fluorodeoxyglucose ( FDG ‐ PET / CT ) is a powerful new technology that has been extensively applied for high‐resolution imaging in mammals but not fish. CT scanning provides detailed anatomical three‐dimensional imaging. PET scanning detects ar...
Partial heat acclimation of athletes with spinal cord lesionNARA Subscribed
Trans‐hemispheric effects of large volcanic eruptions as recorded by an early 19th century diaryNARA Subscribed
An early 19th century diary, belonging to a farmer from NW England, contains detailed daily weather entries over a 15‐year period from 1815 to 1829. The diary period encompasses the Tambora volcanic eruption and pre‐dates the establishment of routine meteorological observations. The diary entries were imported into a database and the descriptive entries categorised and transformed into ordinal data for statistical analysis, me...
Recent extensions of occupancy modeling have focused not only on the distribution of species over space, but also on additional state variables (e.g., reproducing or not, with or without disease organisms, relative abundance categories) that provide extra information about occupied sites. These biologist‐driven extensions are characterized by ambiguity in both species presence and correct state classification, caused by imperf...