Data Analysis in Community and Landscape Ecology.

Green, R. H.; Jongman, R.H.G.; Braak, C.J.F. ter; Tongeren, O. F. R. van

doi:10.2307/2531665

Cited by 152 publications

(2 citation statements)

References 95 publications

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“…To characterize the similarity of environmental features in high ice-content permafrost areas, the similarity coefficient was employed to classify the system. Cosine similarity was used to evaluate the similarity of two vectors by calculating the cosine of their angle [40]. It is calculated as:…”

Section: Systematic Cluster Analysesmentioning

confidence: 99%

Environmental Characteristics of High Ice-Content Permafrost on the Qinghai–Tibetan Plateau

Fan,

Wang,

Niu

et al. 2023

Remote Sensing

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Permafrost areas are sensitive to climate change and have a significant impact on energy and water cycles. Ground ice is a crucial component on the Qinghai–Tibetan Plateau (QTP). Understanding the environmental characteristics of ground ice is vital for accurately modeling its distribution and evolution. In this study, we analyzed 15 environmental characteristics of high ice-content permafrost sites. These attributes were extracted from 400 high ice-content permafrost datasets including 300 drilling boreholes and 100 thaw slumps collected throughout the entire plateau using large-scale remote sensing data and their products. The results are as follows: The mean annual air temperature in areas where high ice-content permafrost exists ranges from −5 to −3.5 °C, with an average warming rate of 0.08 °C/a. Additionally, there was an average increase in precipitation of about 25 mm/10a and an increase in soil moisture of about 4%/10a. Geomorphology strongly influences the occurrence of high ice content permafrost, with 85% of high ice-content permafrost development at altitudes between 4400 and 5100 m. Approximately 86% of high ice-content permafrost were developed in lowland or relatively flat areas, preferably in gently sloping and shady slope regions. Soils exhibit less variability in clay particles and more variability in silt and sand. Key indicators in the high ice content permafrost region include warming rate, active layer thickness, elevation, bulk density, soil thickness, clay content, precipitation, soil moisture, and NDVI. High ice-content permafrost is the result of a combination of environmental factors and is expected to undergo significant changes in the future. This study provides a foundation for comprehending the environmental changes in the high ice-content permafrost areas and modeling the distribution of ground ice. It underscores the urgent need to address the significant environmental changes faced by high ice-content permafrost regions.

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Section: Systematic Cluster Analysesmentioning

confidence: 99%

Environmental Characteristics of High Ice-Content Permafrost on the Qinghai–Tibetan Plateau

Fan,

Wang,

Niu

et al. 2023

Remote Sensing

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“…All avian species encountered during this study were classified into five guilds viz., granivores, frugivores, carnivores, insectivores and omnivores. Percentage share in the abundance of these guilds was calculated for each ecological zone (Jongman et al 1995, Fraterrigo & Wiens 2005.…”

Section: Guild Diversitymentioning

confidence: 99%

Avian assemblage along an urban gradient: diversity, abundance and richness

et al. 2020

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Diversity in avian assemblages of urban (UR), peri-urban (PE) and rural (RU) areas was studied to explore variations in the avian community dynamics in rural – urban gradient. For this purpose, sampling was done from September 2013 to August 2015. A total of 35 sites, each covering an area of 300 m2 were sampled by using point count method. At each site, randomly three points (minimally 5 m apart from each other) were selected to study the birds. According to data, species richness (F2, 32=47.18, P<0.001) varied significantly along a rural-urban gradient. A significant difference in avian density per sampling site (F2, 32=105.41, P<0.001) was also observed along urbanization gradient. In PE and RU areas, avian assemblages were more diverse than UR areas. Among avian guilds, omnivores were the most abundant in UR while insectivores in PE areas. Frugivores and carnivores were abundant in RU areas. Granivores were recorded in all habitats with similar diversity. A close association was recorded in bird density of RU and PE areas than UR areas. Bird species richness and diversity showed negative correlation with built area and positive correlation with vegetation cover in an area.

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Evaluating fishery impacts using metrics of community structure

Rice¹

2000

ICES Journal of Marine Science

157

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Data Analysis in Community and Landscape Ecology.

Cited by 152 publications

References 95 publications

Environmental Characteristics of High Ice-Content Permafrost on the Qinghai–Tibetan Plateau

Environmental Characteristics of High Ice-Content Permafrost on the Qinghai–Tibetan Plateau

Avian assemblage along an urban gradient: diversity, abundance and richness

Evaluating fishery impacts using metrics of community structure

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