Hydrological and topographic determinants of biomass and species richness in a Mediterranean-climate shrubland
| العنوان: | Hydrological and topographic determinants of biomass and species richness in a Mediterranean-climate shrubland |
|---|---|
| المؤلفون: | Rodrigo Méndez-Alonzo, Enrique R. Vivoni, Stephen H. Bullock, Samantha Díaz de León-Guerrero |
| المصدر: | PLoS ONE PLoS ONE, Vol 16, Iss 5, p e0252154 (2021) |
| بيانات النشر: | Public Library of Science, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Leaves, Atmospheric Science, Ecological Metrics, Science, Rain, Climate, Plant Science, Ecosystems, Shrubland, Soil, Meteorology, Common species, Water Quality, Biomass, Mexico, Ecosystem, Biomass (ecology), geography, Multidisciplinary, geography.geographical_feature_category, Ecology, Total Dissolved Solids, Plant Anatomy, Ecology and Environmental Sciences, Organisms, Species diversity, Biology and Life Sciences, Eukaryota, Water, Species Diversity, Plants, Chaparral, Grassland, Agronomy, Soil water, Earth Sciences, Plant cover, Environmental science, Medicine, Species richness, Shrubs, Ecosystem Functioning, Research Article |
| الوصف: | BackgroundIn arid and semiarid shrublands, water availability directly influences ecosystem properties. However, few empirical tests have determined the association between particular soil and hydrology traits with biodiversity and ecosystem biomass at the local scale.MethodsWe tested if plant species richness (S) and aboveground biomass (AGB) were associated with soil and topographic properties on 36 plots (ca. 12.5 m2) in 17 hectares of chaparral in the Mediterranean-climate of Valle de Guadalupe, Baja California, México. We used close-to-the-ground aerial photography to quantify sky-view cover per species, including all growth forms. We derived an elevation model (5 cm) from other aerial imagery. We estimated six soil properties (soil water potential, organic matter content, water content, pH, total dissolved solids concentration, and texture) and four landscape metrics (slope, aspect, elevation, and topographic index) for the 36 plots. We quantified the biomass of stems, leaves, and reproductive structures, per species.Results86% of AGB was in stems, while non-woody species represented 0.7% of AGB but comprised 38% ofS(29 species). Aboveground biomass and species richness were unrelated across the landscape.Swas correlated with aspect and elevation (R= 0.53, aspectP= 0.035, elevationP= 0.05), while AGB (0.006–9.17 Kg m-2) increased with soil water potential and clay content (R= 0.51,P= 0.02, andP= 0.04). Only three species (11% of totalS) occupied 65% of the total plant cover, and the remaining 26 represented only 35%. Cover was negatively correlated withS(R= -0.38,P= 0.02). 75% of AGB was concentrated in 30% of the 36 plots, and 96% of AGB corresponded to only 20% of 29 species.DiscussionAt the scale of small plots in our studied Mediterranean-climate shrubland in Baja California, AGB was most affected by soil water storage. AGB and cover were dominated by a few species, and only cover was negatively related toS.Swas comprised mostly by uncommon species and tended to increase as plant cover decreased. |
| اللغة: | English |
| تدمد: | 1932-6203 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::788fa1ba08435cc097cea0cd08d96b9d http://europepmc.org/articles/PMC8158923 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....788fa1ba08435cc097cea0cd08d96b9d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19326203 |
|---|