Quantifying high resolution transitional breaks in plant and mammal distributions at regional extent and their association with climate, topography and geology.

<h4>Objectives</h4>We quantify spatial turnover in communities of 1939 plant and 59 mammal species at 2.5 km resolution across a topographically heterogeneous region in south-eastern Australia to identify distributional breaks and low turnover zones where multiple species distributions o...

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Autores principales:	Giovanni Di Virgilio, Shawn W Laffan, Malte C Ebach
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4dfaeb4ad0df4f3fb9e79e0d6ca00e08
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spelling	oai:doaj.org-article:4dfaeb4ad0df4f3fb9e79e0d6ca00e082021-11-18T07:51:16ZQuantifying high resolution transitional breaks in plant and mammal distributions at regional extent and their association with climate, topography and geology.1932-620310.1371/journal.pone.0059227https://doaj.org/article/4dfaeb4ad0df4f3fb9e79e0d6ca00e082013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23560044/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Objectives</h4>We quantify spatial turnover in communities of 1939 plant and 59 mammal species at 2.5 km resolution across a topographically heterogeneous region in south-eastern Australia to identify distributional breaks and low turnover zones where multiple species distributions overlap. Environmental turnover is measured to determine how climate, topography and geology influence biotic turnover differently across a variety of biogeographic breaks and overlaps. We identify the genera driving turnover and confirm the versatility of this approach across spatial scales and locations.<h4>Methods</h4>Directional moving window analyses, rotated through 360°, were used to measure spatial turnover variation in different directions between gridded cells containing georeferenced plant and mammal occurrences and environmental variables. Generalised linear models were used to compare taxic turnover results with equivalent analyses for geology, regolith weathering, elevation, slope, solar radiation, annual precipitation and annual mean temperature, both uniformly across the entire study area and by stratifying it into zones of high and low turnover. Identified breaks and transitions were compared to a conservation bioregionalisation framework widely used in Australia.<h4>Results/significance</h4>Detailed delineations of plant and mammal turnover zones with gradational boundaries denoted subtle variation in species assemblages. Turnover patterns often diverged from bioregion boundaries, though plant turnover adhered most closely. A prominent break zone contained either comparable or greater numbers of unique genera than adjacent overlaps, but these were concentrated in a small subsection relatively under-protected by conservation reserves. The environmental correlates of biotic turnover varied for different turnover zones in different subsections of the study area. Topography and temperature showed much stronger relationships with plant turnover in a topographically complex overlap, relative to a lowland overlap where weathering was most predictive. This method can quantify transitional turnover patterns from small to broad extents, at different resolutions for any location, and complements broad-scale bioregionalisation schemes in conservation planning.Giovanni Di VirgilioShawn W LaffanMalte C EbachPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 4, p e59227 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Giovanni Di Virgilio Shawn W Laffan Malte C Ebach Quantifying high resolution transitional breaks in plant and mammal distributions at regional extent and their association with climate, topography and geology.
description	<h4>Objectives</h4>We quantify spatial turnover in communities of 1939 plant and 59 mammal species at 2.5 km resolution across a topographically heterogeneous region in south-eastern Australia to identify distributional breaks and low turnover zones where multiple species distributions overlap. Environmental turnover is measured to determine how climate, topography and geology influence biotic turnover differently across a variety of biogeographic breaks and overlaps. We identify the genera driving turnover and confirm the versatility of this approach across spatial scales and locations.<h4>Methods</h4>Directional moving window analyses, rotated through 360°, were used to measure spatial turnover variation in different directions between gridded cells containing georeferenced plant and mammal occurrences and environmental variables. Generalised linear models were used to compare taxic turnover results with equivalent analyses for geology, regolith weathering, elevation, slope, solar radiation, annual precipitation and annual mean temperature, both uniformly across the entire study area and by stratifying it into zones of high and low turnover. Identified breaks and transitions were compared to a conservation bioregionalisation framework widely used in Australia.<h4>Results/significance</h4>Detailed delineations of plant and mammal turnover zones with gradational boundaries denoted subtle variation in species assemblages. Turnover patterns often diverged from bioregion boundaries, though plant turnover adhered most closely. A prominent break zone contained either comparable or greater numbers of unique genera than adjacent overlaps, but these were concentrated in a small subsection relatively under-protected by conservation reserves. The environmental correlates of biotic turnover varied for different turnover zones in different subsections of the study area. Topography and temperature showed much stronger relationships with plant turnover in a topographically complex overlap, relative to a lowland overlap where weathering was most predictive. This method can quantify transitional turnover patterns from small to broad extents, at different resolutions for any location, and complements broad-scale bioregionalisation schemes in conservation planning.
format	article
author	Giovanni Di Virgilio Shawn W Laffan Malte C Ebach
author_facet	Giovanni Di Virgilio Shawn W Laffan Malte C Ebach
author_sort	Giovanni Di Virgilio
title	Quantifying high resolution transitional breaks in plant and mammal distributions at regional extent and their association with climate, topography and geology.
title_short	Quantifying high resolution transitional breaks in plant and mammal distributions at regional extent and their association with climate, topography and geology.
title_full	Quantifying high resolution transitional breaks in plant and mammal distributions at regional extent and their association with climate, topography and geology.
title_fullStr	Quantifying high resolution transitional breaks in plant and mammal distributions at regional extent and their association with climate, topography and geology.
title_full_unstemmed	Quantifying high resolution transitional breaks in plant and mammal distributions at regional extent and their association with climate, topography and geology.
title_sort	quantifying high resolution transitional breaks in plant and mammal distributions at regional extent and their association with climate, topography and geology.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/4dfaeb4ad0df4f3fb9e79e0d6ca00e08
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Quantifying high resolution transitional breaks in plant and mammal distributions at regional extent and their association with climate, topography and geology.

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