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Practical and useful vegetation monitoring methods are needed, and data compatibility and validation of remotely sensed data are desirable. Methods have not been adequately tested for heathy woodlands. We tested the feasibility of detecting species composition shifts in remnant woodland in South Australia, comparing historical (1986) plot data with temporal replicates (2010). We compared the uniformity of species composition among spatially scattered versus spatially clustered plots. At two sites, we compared visual and point-intercept estimation of cover and species diversity. Species composition (presence/absence) shifted between 1986 and 2010. Species that significantly shifted in frequency had low cover. Observations of decreasing species were consistent with predictions from temperature response curves (generalised additive models) for climate change over the period. However, long-term trends could not be distinguished from medium-term dynamics or short-term changes in visibility from this dataset. Difficulties were highlighted in assessing compositional change using historical baselines established for a different purpose in terms of spatial sampling and accuracy of replicate plots, differences in standard plot methods and verification of species identifications. Spatially clustered replicate plots were more similar in species composition than spatially scattered plots, improving change detection potential but decreasing area of inference. Visual surveys detected more species than point-intercepts. Visual cover estimates differed little from point-intercepts although underestimating cover in some instances relative to intercepts. Point-intercepts provide more precise cover estimates of dominant species but took longer and were difficult in steep, heathy terrain. A decision tree based on costs and benefits is presented assessing monitoring options based on data presented. The appropriate method is a function of available resources, the need for precise cover estimates versus adequate species detection, replication and practical considerations such as access and terrain.
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http://dx.doi.org/10.1007/s10661-012-2842-3 | DOI Listing |
ACS Earth Space Chem
December 2024
University of Iowa, Iowa City, Iowa state 52242, United States.
Environmental films form when airborne particles and molecular species adsorb on solid surfaces. Recent studies have characterized these films but overlook how collection methods and host-surface character (orientation, chemical functionality, or height) change the deposition process. In this work, environmental films are collected at a rural location on gold and silicon surfaces (water contact angles of ca.
View Article and Find Full Text PDFJ Med Life
October 2024
Faculty of Medicine, Ovidius University, Constanta, Romania.
The connection between the immune response and the composition of gut microbiota has been associated with an increased prevalence of atopic dermatitis in the first year of life. The study aimed to investigate gut microbiota characteristics in infants with atopic dermatitis compared to healthy infants to better understand the link between early-life microbiota composition and the development of atopic dermatitis. The study analyzed the intestinal microbiota of 121 infants with clinical signs of atopic dermatitis, divided into Group I (infants with atopic dermatitis) and Group II (healthy controls).
View Article and Find Full Text PDFChem Sci
December 2024
Institute of Advanced Materials, Wroclaw University of Science and Technology Wrocław Poland
Near-infrared (NIR) emitters with high two-photon absorption (2PA) cross-sections are of interest to enable imaging in the tissue transparency windows. This study explores the potential of DNA-stabilized silver nanoclusters (Ag -DNAs) as water-soluble two-photon absorbers. We investigate 2PA of four different atomically precise Ag -DNA species with far-red to NIR emission and varying nanocluster and ligand compositions.
View Article and Find Full Text PDFMicrosc Res Tech
December 2024
Department of Botany, Bharathiar University, Coimbatore, India.
Vincetoxicum capparidifolium (Wight & Arn.) Kuntze [=Tylophora capparidifolia (Wight & Arn.) Kuntze], belonging to the family Apocynaceae, is a medicinal plant species endemic to the southern Western Ghats, Tamil Nadu, India.
View Article and Find Full Text PDFBiomed Pharmacother
December 2024
Department of Clinical Immuno-Oncology, Clinical Research Institute for Clinical Pharmacology and Therapeutics, Showa University, Tokyo, Japan; Division of Medical Oncology, Department of Medicine, Showa University Graduate School of Medicine, Tokyo, Japan. Electronic address:
Gut bacteria play pivotal roles in the antitumor effects of immune checkpoint inhibitors (ICIs). However, antimicrobial therapy, often necessary for infections in cancer patients, can reduce the efficacy of ICIs. The potential of probiotics to restore ICI efficacy remains uncertain.
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