L. Clark results 557
· Newest (Page 1/23, per page 25)
Author: L. Clark ×Clear All Filters
Search Results
Intertropical convergence zone and El Niño Southern oscillation controls on late Holocene rainfall variability in PalauNARA Subscribed
The Tropical West Pacific is an understudied region in environmental and archaeological studies when compared to continental regions. The unique geologies, climate systems, and ecological dynamics in the Tropical West Pacific greatly limit the transferrability of palaeoenvironmental proxies established from studies outside of this region. To address this gap, we present a ~5600 yr multi-proxy record of environmental change fro...
Root proliferation and microbial enzyme strategies shape elevated CO₂ effects on wheat rhizosphere priming in farming soilsNARA Subscribed
Aims Elevated atmospheric CO 2 can impact soil organic carbon (SOC) cycling through increased photosynthetic carbon allocation in the rhizosphere, accelerating the decomposition of SOC (rhizosphere priming). How elevated CO 2 modifies priming intensity in different soil types and the associated microbial functional pathways remains poorly understood. Methods Using dual 13 C/ 15 N labelling, this study compared rhizosphere prim...
From Highlands to Henge: Refining the Provenance and Transport Pathways of Stonehenge's Altar StoneNARA Subscribed
The Altar Stone, the 6000 kg central sandstone megalith at Stonehenge in southern England, is suggested to have originated from the Orcadian Basin in northeast Scotland, some 700 km away. However, its source location within this large basin remains unresolved and its mode of transport uncertain. Proposed mechanisms include Neolithic human transport via marine or overland routes or southward movement as a glacial erratic. Here,...
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...
The impact of isosmotic conditions on the metabolism and hypoxia tolerance of a reportedly oxyconforming teleostNARA Subscribed
Fish must manage the competing demands of ion balance and gas exchange across the gills – a physiological tension known as the osmorespiratory compromise. In dynamic estuarine environments, the osmorespiratory compromise may be exacerbated by variable salinity and periods of hypoxia that demand high respiratory work. This study examined whether acute exposure to isosmotic conditions (9 ppt) lowers aerobic metabolism and enhanc...
Reef shape, position and flow regime mediate bleaching severity in a southern Great Barrier Reef platform reef systemNARA Subscribed
Coral bleaching represents a primary threat to coral reefs worldwide. Patch reefs in lagoon systems are highly susceptible to bleaching due to shallow, high residence water, high light intensity and reef edge effects. Geomorphic, spatial and hydrodynamic factors are important in modifying environmental stressors, yet their interacting roles in influencing bleaching responses are not well understood. In this study, we investiga...
MT-ATP6 9035T>C Variant Causes Ataxia With Azoospermia and Apparent Anticipation in a Four-generation KindredNARA Subscribed
Background The hereditary cerebellar ataxias are a clinically and genetically heterogeneous group of disorders characterized by progressive cerebellar degeneration leading to incoordination of gait, speech, limb, and eye movements. Hundreds of genes encoding diverse proteins underlie this family of degenerative disorders that may exhibit autosomal dominant, recessive, mitochondrial, or X-linked inheritance. Variations in clini...
Interpretable deep learning reveals spatiotemporal MRI features of brain aging that align with neurodegenerationNARA Subscribed
Cortical thinning and atrophy are hallmarks of brain aging that have been characterized using magnetic resonance imaging (MRI). Brain aging involves many neuroanatomic features whose effects on brain structure remain unexplored. To address this challenge, we trained interpretable deep neural networks (DNNs) to estimate brain age (BA) from T 1 -weighted ( T 1 w) MRI. By identifying MRI features unapparent to humans, DNNs can fi...
The complex population structure of Tamanend's bottlenose dolphins ( Tursiops erebennus ) along the U.S. Mid‐Atlantic coast complicates assessment of their bycatch. To improve our understanding of the stock identity of individual dolphins taken as bycatch in this region, we compared images of the dorsal fins of bottlenose dolphins that stranded with evidence of fishery interactions (FI+) to the Mid‐Atlantic Bottlenose Dolphin...
New Guinea, the most botanically diverse island on the planet, is the location for one of the boldest conservation initiatives. The Manokwari Declaration aims to achieve 70% conservation designation for the Bird's Head Peninsula. This is 40% higher than the 2022 Global Biodiversity Framework target. However, there is a lack of species occurrence data to support evidence of where biodiversity can be best protected. To address t...