scholarly journals Assessing above-ground biomass-functional diversity relationships in temperate forests in northern Mexico

2020 ◽  
Author(s):  
Benedicto Vargas-Larreta ◽  
Jorge Omar Lopez Martinez ◽  
Edgar J. González ◽  
Jose Javier Corral-Rivas ◽  
Francisco Javier Hernández
Keyword(s):  
Species Richness ◽  
Functional Diversity ◽  
Taxonomic Diversity ◽  
Maximum Height ◽  
Above Ground Biomass ◽  
Northern Mexico ◽  
Ground Biomass ◽  
Sierra Madre ◽  
Community Weighted Mean ◽  
The Relationship

Abstract Background: Studies on the relationship between biodiversity and ecosystem productivity have suggested that species richness and functional diversity are the main drivers of ecosystem processes. Several patterns on this relationship have been found, including positive, unimodal, negative, and neutral trends, keeping the issue controversial. In this study, taxonomic diversity and functional diversity as drivers of above-ground biomass (AGB) were comparated, and the mechanisms that influence biomass production were investigated by testing the complementarity and the mass-ratio hypotheses.Methods: Using data from 414 permanent sample plots, covering 23% of temperate forest in the Sierra Madre Oriental (México). We estimated the above-gound biomass (AGB), taxonomic and functional diversity indices, as well as community weighted mean values (CWM) for three functional trais (maximum height, leaf size and wood density) for trees ≥7.5 cm d.b.h., in managed and unmanaged stands. To compare taxonomic diversity differences between managed and unmanaged stands we carried out a rarefaction analysis. Furthermore, we evaluated the relationship between AGB and taxonomic and functional diversity metrics, as well as CWM traits throught spatial autoregressive models.Results: We found a hump-shaped relationship between AGB and species richness in managed and unmanaged forests. CMW of maximum height was the most important predictor of AGB in both stands, which suggested that the mechanism underlaying the AGB-diversity relationship is the dominance of some highly productive species, supporting the mass-ratio hypothesis. Above-ground biomass was significantly correlated with three of the five functional diversity metrics, CWM maximum height and species richness. Our results show the importance of take into account spatial autocorrelation in the construction of predictive models to avoid spurious patterns in the AGB-diversity relationship.Conclusion: Species richness, maximum height, functional richness, functional dispersion and RaoQ indices relate with above-ground biomass production in temperate mixed-species and uneven-aged forests of northern Mexico. These forests show a hump-shaped AGB-species richness relationship. Functional diversity explains better AGB production than classical taxonomic diversity. Community weighted mean traits provide key information to explain stand biomass in these forests, where maximum tree height seems to be a more suitable trait for understanding the biomass accumulation process in these ecosystems. Although the impact of forest management on biodiversity is still debated, it has not changed the AGB-diversity relationships in the forests of the Sierra Madre Occidental, Mexico.

scholarly journals Assessing above-ground biomass-functional diversity relationships in temperate forests in northern Mexico

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Benedicto Vargas-Larreta ◽  
Jorge Omar López-Martínez ◽  
Edgar J. González ◽  
José Javier Corral-Rivas ◽  
Francisco Javier Hernández
Keyword(s):  
Species Richness ◽  
Functional Diversity ◽  
Taxonomic Diversity ◽  
Maximum Height ◽  
Above Ground Biomass ◽  
Northern Mexico ◽  
Ground Biomass ◽  
Sierra Madre ◽  
Community Weighted Mean ◽  
The Relationship

Abstract Background Studies on the relationship between biodiversity and ecosystem productivity have suggested that species richness and functional diversity are the main drivers of ecosystem processes. Several patterns on this relationship have been found, including positive, unimodal, negative, and neutral trends, keeping the issue controversial. In this study, taxonomic diversity and functional diversity as drivers of above-ground biomass (AGB) were compared, and the mechanisms that influence biomass production were investigated by testing the complementarity and the mass-ratio hypotheses. Methods Using data from 414 permanent sample plots, covering 23% of temperate forest in the Sierra Madre Oriental (México), we estimated the above-gound biomass (AGB), taxonomic and functional diversity indices, as well as community weighted mean values (CWM) for three functional traits (maximum height, leaf size and wood density) for trees ≥7.5 cm DBH, in managed and unmanaged stands. To compare taxonomic diversity differences between managed and unmanaged stands we carried out a rarefaction analysis. Furthermore, we evaluated the relationship between AGB and taxonomic and functional diversity metrics, as well as CWM traits throught spatial autoregressive models. Results We found a hump-shaped relationship between AGB and species richness in managed and unmanaged forests. CMW of maximum height was the most important predictor of AGB in both stands, which suggested that the mechanism underlaying the AGB-diversity relationship is the dominance of some highly productive species, supporting the mass-ratio hypothesis. Above-ground biomass was significantly correlated with three of the five functional diversity metrics, CWM maximum height and species richness. Our results show the importance of taking into account spatial autocorrelation in the construction of predictive models to avoid spurious patterns in the AGB-diversity relationship. Conclusion Species richness, maximum height, functional richness, functional dispersion and RaoQ indices relate with above-ground biomass production in temperate mixed-species and uneven-aged forests of northern Mexico. These forests show a hump-shaped AGB-species richness relationship. Functional diversity explains better AGB production than classical taxonomic diversity. Community weighted mean traits provide key information to explain stand biomass in these forests, where maximum tree height seems to be a more suitable trait for understanding the biomass accumulation process in these ecosystems. Although the impact of forest management on biodiversity is still debated, it has not changed the AGB-diversity relationships in the forests of the Sierra Madre Occidental, Mexico.

scholarly journals Assessing above-ground biomass-functional diversity relationships in temperate forests in northern Mexico

2020 ◽  
Author(s):  
Benedicto Vargas-Larreta ◽  
Jorge Omar Lopez Martinez ◽  
Edgar J. González ◽  
Jose Javier Corral-Rivas ◽  
Francisco Javier Hernández
Keyword(s):  
Species Richness ◽  
Functional Diversity ◽  
Taxonomic Diversity ◽  
Maximum Height ◽  
Above Ground Biomass ◽  
Northern Mexico ◽  
Ground Biomass ◽  
Sierra Madre ◽  
Community Weighted Mean ◽  
The Relationship

Abstract Background: Studies on the relationship between biodiversity and ecosystem productivity have suggested that species richness and functional diversity are the main drivers of ecosystem processes. Several patterns on this relationship have been found, including positive, unimodal, negative, and neutral trends, keeping the issue controversial. In this study, taxonomic diversity and functional diversity as drivers of above-ground biomass (AGB) were comparated, and the mechanisms that influence biomass production were investigated by testing the complementarity and the mass-ratio hypotheses. Methods: Using data from 414 permanent sample plots, covering 23% of temperate forest in the Sierra Madre Oriental (México). We estimated the above-gound biomass (AGB), taxonomic and functional diversity indices, as well as community weighted mean values (CWM) for three functional trais (maximum height, leaf size and wood density) for trees ≥7.5 cm d.b.h., in managed and unmanaged stands. To compare taxonomic diversity differences between managed and unmanaged stands we carried out a rarefaction analysis. Furthermore, we evaluated the relationship between AGB and taxonomic and functional diversity metrics, as well as CWM traits throught spatial autoregressive models. Results: We found a hump-shaped relationship between AGB and species richness in managed and unmanaged forests. CMW of maximum height was the most important predictor of AGB in both stands, which suggested that the mechanism underlaying the AGB-diversity relationship is the dominance of some highly productive species, supporting the mass-ratio hypothesis. Above-ground biomass was significantly correlated with three of the five functional diversity metrics, CWM maximum height and species richness. Our results show the importance of take into account spatial autocorrelation in the construction of predictive models to avoid spurious patterns in the AGB-diversity relationship. Conclusion: Species richness, maximum height, functional richness, functional dispersion and RaoQ indices relate with above-ground biomass production in temperate mixed-species and uneven-aged forests of northern Mexico. These forests show a hump-shaped AGB-species richness relationship. Functional diversity explains better AGB production than classical taxonomic diversity. Community weighted mean traits provide key information to explain stand biomass in these forests, where maximum tree height seems to be a more suitable trait for understanding the biomass accumulation process in these ecosystems. Although the impact of forest management on biodiversity is still debated, it has not changed the AGB-diversity relationships in the forests of the Sierra Madre Occidental, Mexico.

scholarly journals Assessing Functional Diversity-Productivity Relationships in Temperate Forests in Northern Mexico

2020 ◽  
Author(s):  
Benedicto Vargas-Larreta ◽  
Jorge O. López-Martínez ◽  
Jose Javier Corral-Rivas ◽  
Francisco Javier Hernández
Keyword(s):  
Species Richness ◽  
Functional Diversity ◽  
Biomass Production ◽  
Temperate Forests ◽  
Taxonomic Diversity ◽  
Mass Ratio ◽  
Above Ground Biomass ◽  
Northern Mexico ◽  
Ground Biomass ◽  
Diversity Metrics

Abstract Background: Studies on the relationships between biodiversity and ecosystem productivity have suggested that species richness and functional diversity are the main drivers of ecosystem processes. There is no general pattern regarding the relationship found in various studies, and positive, unimodal, negative, and neutral relationships keep the issue controversial. In this study, taxonomic diversity vs functional diversity as drivers of above-ground biomass were compared, and the mechanisms that influence biomass production were investigated by testing the complementarity and the mass-ratio hypoteses.Methods: Using data from 414 permanent sampling plots, covering 23% of temperate forests in the Sierra Madre Occiental (Mexico), we estimated the above-ground biomass (AGB) for trees ≥7.5 cm d.b.h. in managed and unmanaged stands. We evaluated AGB-diversity relationships (species richness, Shannon-Wiener and Simpson indices), AGB-weighted mean community values ​​(CWM) of tree species functional traits (maximum height, leaf size, and wood density) and five measures of functional diversity (functional dispersion, functional richness, functional uniformity, functional diversity, and RaoQ index).Results: We reveal a consistent hump-shaped relationship between aboveground biomass and species richness in managen and unmanaged forest. CWM_Hmax was the most important predictor of AGB in both managed and unmanaged stands, which suggests that the mechanism that explains the above-ground biomass in these ecosystems is dominated by certain highly productive species in accordance of the mass-ratio hypothesis. There were no significant relationships between taxonomic diversity metrics (Shannon-Wiener and Simpson indices) or measures of functional diversity with AGB. The results support the mass-ratio hypothesis to explain the AGB variations.Conclusions: We concluded that diversity does not influence biomass production in the temperate mixed-species and uneven-aged forests of northern Mexico. These forests showed the classic hump-shaped productivity-species richness relationship, with biomass accumulation increasing at low to intermediate levels of species plant diversity and decreasing at high species richness. Functional diversity explains better forest productivity than classical diversity metrics.

scholarly journals Species Richness and Biomass Relationship in Burned Sites of Imperata-Saccharum Grassland in Suklaphanta Wildlife Reserve, Nepal

2009 ◽  
Vol 15 ◽  
pp. 23-27
Author(s):  
Pitamber Pant ◽  
Hari Datt Lekhak
Keyword(s):  
Species Richness ◽  
Generalized Linear Model ◽  
Plant Community Composition ◽  
Above Ground Biomass ◽  
Ground Biomass ◽  
Burned Site ◽  
June July ◽  
Wildlife Reserve ◽  
The Relationship ◽  
Shaped Pattern

Present study was conducted in the Suklaphanta Wildlife Reserve, Kanchanpur district, far western Nepal during June-July, 2005. A total of 150 quadrats (1m x 1m) were sampled in three differentially treated sites (unburned, early burned and late burned). Plant community composition and above ground biomass at different sites were quantified. The relationship between species richness and biomass was detected in the Imperata-Saccharum grassland. Altogether 100 plant species were recorded in the grassland. The highest number of species (62) was recorded in early burned site, whereas lowest (54) species were recorded from unburned site. Among all species recorded, 23 were common to all sites. The highest species richness (13 species/m²) was recorded in the early burned plot. The above ground biomass was highest (583.93 g/m²) in unburned plot. Mean above ground biomass of all the three sites of the grassland was 249.72 g/m². These results indicate that the burning has significant impact on both species richness and biomass. Maximum species richness was found in the biomass interval between ca. 100-300 g/m² when all the sites were combined. A hump shaped pattern was observed in the grassland when all the data were combined. Key words: Species richness, biomass, generalized linear model, fire.   doi: 10.3126/eco.v15i0.1938 ECOPRINT 15: 23-27, 2008

scholarly journals Plant Taxonomic Diversity Better Explains Soil Fungal and Bacterial Diversity than Functional Diversity in Restored Forest Ecosystems

Plants ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 479 ◽  
Author(s):  
Hanif ◽  
Guo ◽  
Moniruzzaman ◽  
He ◽  
Yu ◽  
...  
Keyword(s):  
Species Richness ◽  
Microbial Diversity ◽  
Soil Properties ◽  
Bacterial Diversity ◽  
Functional Diversity ◽  
Forest Ecosystems ◽  
Taxonomic Diversity ◽  
Soil Microbial Diversity ◽  
Soil Microbial ◽  
Bacterial Richness

Plant attributes have direct and indirect effects on soil microbes via plant inputs and plant-mediated soil changes. However, whether plant taxonomic and functional diversities can explain the soil microbial diversity of restored forest ecosystems remains elusive. Here, we tested the linkage between plant attributes and soil microbial communities in four restored forests (Acacia species, Eucalyptus species, mixed coniferous species, mixed native species). The trait-based approaches were applied for plant properties and high-throughput Illumina sequencing was applied for fungal and bacterial diversity. The total number of soil microbial operational taxonomic units (OTUs) varied among the four forests. The highest richness of fungal OTUs was found in the Acacia forest. However, bacterial OTUs were highest in the Eucalyptus forest. Species richness was positively and significantly related to fungal and bacterial richness. Plant taxonomic diversity (species richness and species diversity) explained more of the soil microbial diversity than the functional diversity and soil properties. Prediction of fungal richness was better than that of bacterial richness. In addition, root traits explained more variation than the leaf traits. Overall, plant taxonomic diversity played a more important role than plant functional diversity and soil properties in shaping the soil microbial diversity of the four forests.

scholarly journals Above-ground biomass and species richness in a Mediterranean salt marsh

1993 ◽  
Vol 4 (3) ◽  
pp. 417-424 ◽  
Author(s):  
L.V. García ◽  
T. Maranón ◽  
A. Moreno ◽  
L. Clemente
Keyword(s):  
Species Richness ◽  
Salt Marsh ◽  
Above Ground Biomass ◽  
Ground Biomass

scholarly journals Estimation of Above Ground Biomass and carbon stocks of Tectona grandis and Gmelina arborea stands in Gorontalo Province, Indonesia

2021 ◽  
Vol 22 (3) ◽  
Author(s):  
YOSEP RUSLIM ◽  
Daud Sandalayuk ◽  
Rochadi Kristiningrum ◽  
Andi Sahri Alam
Keyword(s):  
Tectona Grandis ◽  
Maximum Growth ◽  
Carbon Stocks ◽  
Maximum Point ◽  
Above Ground Biomass ◽  
Gmelina Arborea ◽  
Plantation Forest ◽  
Annual Increment ◽  
Ground Biomass ◽  
The Relationship

Abstract. Ruslim Y, Sandalayuk D, Kristiningrum R, Alam AS. 2021. Estimation of Above Ground Biomass and carbon stocks of Tectona grandis and Gmelina arborea stand in Gorontalo Province, Indonesia. Biodiversitas 22: 1497-1508. Plantation forest plays an important role to fulfill timber needs, while more recently plantation forest is increasingly acknowledged to sequester and store carbon which can mitigate climate change and also as carbon sequestration for the environment. This study aimed to calculate the stand potential, stand biomass and carbon stocks of teak (Tectona grandis) and gmelina (Gmelina arborea) stands in the context of land after being abandoned in Gorontalo Province, Indonesia. Four plots with size of one hectare each were sampled in which each species (i.e. teak and gmelina) consisted of two plots. In each plot, the diameter at the breast-high (1.3 m) and the height of each individual were recorded. Data analysis included growth parameters of the stands (i.e., Mean Annual Increment/MAI and Current Annual Increment/CAI) and above-ground biomass and carbon sequestered by the stands. Simple linear regression using polynomial trendline was used to determine the relationship between variables and the degree of the relationship. The results showed that the maximum growth of teak stands at Plots I and II reached a maximum point at the age of 32 and 25 years with the total volume of 307.50 and 254.81 m3ha-1, respectively. While the maximum growth of gmelina stands at Plots I and II reached a maximum point at the age of 15 years with the total volume of 190.54 and 251.80 m3ha-1, respectively. The biomass content in teak stands at Plots I and II and gmelina stands at Plots I and II were respectively 267.83; 221.94; 104.03 and 137.48 tons ha-1. Meanwhile, the carbon content in teak stands at Plots I and II and gmelina stands at Plots I and II were respectively 125.88; 104.31; 48.90; and 64.62 tons ha-1. The results of the regression analysis suggest that there was strong relationship between carbon sequestered and the age of the stands as well as total basal area. The results of this study suggest that Tectona grandis is more potential to be developed as plantation forest than Gmelina arborea when aiming at carbon sequestration and biomass production.

scholarly journals Diversity and distribution of testate amoebae (Amoebozoa, Rhizaria) in reservoirs, Northeastern Bulgaria

2018 ◽  
Vol 5 (2) ◽  
pp. 90-99
Author(s):  
Rositsa Davidova ◽  
Senay Sevginov
Keyword(s):  
Regression Analysis ◽  
Species Richness ◽  
Diversity Index ◽  
Taxonomic Diversity ◽  
Testate Amoebae ◽  
The Other ◽  
Water Volume ◽  
Species Richness And Abundance ◽  
Relationship Of ◽  
The Relationship

Abstract The aim of the study is to describe the testate amoebae fauna in seven reservoirs in the Northeastern Bulgaria and to investigate the relationship of taxonomic diversity and abundance of these organisms to the some characteristics of the reservoirs. A total of 52 species, varieties and forms belonging to 15 genera were identified in the benthal of the coastal zone. There are significant differences in species richness and abundance between the testacea of different reservoirs. Number of taxa was significantly higher in the Beli Lom (29 species and 12 genera) and Loznitsa (22 species and 13 genera). Most of the reservoirs - Kara Michal, Bogdantsi, Isperih, Lipnik and Brestovene have extremely poor fauna compared to other similar reservoirs. This is confirmed by the low values of the Shannon-Weaver diversity index, which varied between 1.04 and 2.396, as well as by the other indices used to assess the environmental conditions in the reservoirs. The data of the regression analysis showed that a relation between age, surface area and water volume of the reservoirs and the species richness and abundance of testacea is not established.

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