Patterns of Indigenous Tree Species Distribution in Guangdong Province and the Implications for Tree Introduction

2012 ◽  
Vol 518-523 ◽  
pp. 5324-5329 ◽  
Author(s):  
Xiang Lin Wang ◽  
Jing Peng Li ◽  
Yan Zhang ◽  
Zhi Yao Su
Keyword(s):  
Species Distribution ◽  
Indicator Species ◽  
Tree Species ◽  
Guangdong Province ◽  
Distribution Patterns ◽  
Indicator Species Analysis ◽  
Mountain Areas ◽  
Species Analysis ◽  
Significant Difference ◽  
Indigenous Tree Species

Distribution pattern of 1148 indigenous tree species in Guangdong province and their relations to the environment were investigated based on the 0.5°×0.5° latitude-longitude grid system. The results showed that indigenous tree species richness increased with increasing latitude. Richness peaked in the middle of the study area with longitudinal gradient. Four ecological areas for indigenous tree species distribution were delimited using cluster analysis and TWINSPAN (two-way indicator species analysis). Indicator Species Analysis showed a significant difference was found in indicator species distribution across latitude gradient and the 4 ecological areas. Northern mountain areas and southern coastal areas possessed most of the indicator species (IV ≥ 0.7), among which Celtis philippensis, Gironniera cuspidata and Symplocos chunii were strongly indicative of the environmental characteristics. The study of distribution patterns and classification of ecological areas, which reflects different geographical and climatic characteristics, will be of significant implications for introduction of indigenous tree species from natural ecological areas.

scholarly journals Influence of environmental variations on the formation of microhabitats within a fragment of Seasonally Dry Tropical Forest - SDTF, Brazil

2018 ◽  
Vol 42 (2) ◽  
Author(s):  
Gabriela Gomes Pires de Paula ◽  
Rubens Manoel dos Santos ◽  
Gisele Cristina de Oliveira Menino ◽  
Deborah Mattos Guimarães Apgaua ◽  
Diego Gualberto Sales Pereira ◽  
...  
Keyword(s):  
Tropical Forests ◽  
Indicator Species ◽  
Tree Species ◽  
Environmental Variables ◽  
Indicator Species Analysis ◽  
Seasonally Dry ◽  
Species Analysis ◽  
Seasonally Dry Tropical Forests ◽  
Dry Tropical Forests ◽  
Environmental Variations

ABSTRACT Caatinga represents one of the two major centers of Seasonally Dry Tropical Forests (SDTF) and is completely inserted in the Brazilian territory. The present work aimed to evaluate the structure of two micro-environments and relate them to environmental variables. Twenty 20 × 20 m plots were placed in which we measured the height and CBH and made the botanical identification of all trees with CBH ≥10 cm. The CCA and indicator species analysis presented a clear distribution of species according to the micro-environments. We concluded that the presence of limestone slabs provided the formation of microhabitats, thus influencing the distribution and composition of tree species, what characterized the phytoecological unit here referred as “furados”.

Indicator Species Analysis of Forest Communities along a Disturbance Gradient in Guangzhou, China

2012 ◽  
Vol 195-196 ◽  
pp. 1275-1282
Author(s):  
Chun Zhu ◽  
Yong Mei Xiong ◽  
Xu Dong Ma ◽  
Xian Dong Ke ◽  
Zhi Yao Su
Keyword(s):  
Species Composition ◽  
Indicator Species ◽  
Urban Forest ◽  
Diversity Index ◽  
Indicator Species Analysis ◽  
Forest Communities ◽  
Disturbance Gradient ◽  
Tree Layer ◽  
Species Analysis ◽  
Significant Difference

In order to reveal the effect of disturbance on species composition and detect indicator species for disturbance gradients, we conducted an investigation of urban forest communities along a disturbance gradient in Guangzhou, China. Species richness in the tree layer and understory had no significant difference among disturbance gradients, but Simpson index, Shannon-Weiner index and Evenness index varied significantly.species diversity index decreased with disturbance gradient. Multi-Response Permutation Procedures (MRPP) revealed high significance in species composition of both tree and understory layer among different disturbance gradients. Twelve species from the tree layer and 25 from the understory were detected to characterize the forest communities with a certain disturbance regime by Indicator Species Analysis (ISA). Indicator species help enhance our understanding of species-environment relationship, and the ecological response of indicator species to disturbance can be used for monitoring forest environmental change.

scholarly journals Functional grouping and establishment of distribution patterns of invasive plants in China using self-organizing maps and indicator species analysis

2009 ◽  
Vol 61 (1) ◽  
pp. 71-78 ◽  
Author(s):  
Zi-Bo Wang ◽  
You-Fang Chen ◽  
You-Hua Chen
Keyword(s):  
Invasive Species ◽  
Functional Groups ◽  
Invasive Plants ◽  
Indicator Species ◽  
Distribution Patterns ◽  
Indicator Species Analysis ◽  
Self Organizing Maps ◽  
Species Analysis ◽  
Macro Scale ◽  
Self Organizing

In the present study, we introduce two techniques - self-organizing maps (SOM) and indicator species analysis (INDVAL) - for understanding the richness patterns of invasive species. We first employed SOM to identify functional groups and then used INDVAL to identify the representative areas characterizing these functional groups. Quantitative traits and distributional information on 127 invasive plants in 28 provinces of China were collected to form the matrices for our study. The results indicate Jiangsu to be the top province with the highest number of invasive species, while Ningxia was the lowest. Six functional groups were identified by the SOM method, and five of them were found to have significantly representative provinces by the INDVAL method. Our study represents the first attempt to combine self-organizing maps and indicator species analysis to assess the macro-scale distribution of exotic species.

Spring Bird Community Structure in Response to Habitat Heterogeneity in a Subtropical Hilly Landscape

2014 ◽  
Vol 1010-1012 ◽  
pp. 121-125
Author(s):  
Wen Bin Li ◽  
Zhi Ming Mo ◽  
Xing Ting Chen ◽  
Chun Huang ◽  
Ming Feng Xu
Keyword(s):  
Indicator Species ◽  
Habitat Heterogeneity ◽  
Southern China ◽  
Bird Species ◽  
Bird Communities ◽  
Bird Diversity ◽  
Indicator Species Analysis ◽  
Heterogeneous Habitats ◽  
Species Analysis ◽  
The Impact

To examine the impact of habitat heterogeneity on the bird communities, we investigated the structural differences of various bird communities occurring in heterogeneous habitats in the subtropical hilly areas of southern China. We used indicator Species Analysis (ISA) to test the association of specific bird species to particular habitats. We performed Two-way Cluster Analysis to find species patterning in response to habitat fragmentation. Our results demonstrated that heterogeneous habitats promoted bird diversity and human activities affected bird behavior. Indicator Species Analysis demonstrated that similar habitats had similar bird communities, while different habitats supported various bird indicator species. Although habitat diversity increased bird diversity of a region, it was unfavorable for the maintenance of specialized birds in the forests of the subtropical hilly area.

Two Way Indicator Species Analysis (TWINSPAN) of the Herbaceous Vegetation in an Inland Wetland Ecosystem of Doon Valley Himalaya, India

1970 ◽  
Vol 3 ◽  
pp. 23-31 ◽  
Author(s):  
R. K. Manhas ◽  
M. K. Gautam ◽  
Deepa Kumari
Keyword(s):  
Soil Moisture ◽  
Key Words ◽  
Plant Species ◽  
Indicator Species ◽  
Indigenous Species ◽  
Indicator Species Analysis ◽  
Wetland Ecosystem ◽  
Herbaceous Vegetation ◽  
Doon Valley ◽  
Species Analysis

In swamp distribution, dominance and survival of a species is very much governed by the soil moisture and period of flooding. The present study was conducted to classify the communities and plant species, and to have an idea about various associations of plants present in the swamp with respect to soil moisture. Two way indicator species analysis (TWINSPAN) classified the communities into four and plant species into eleven groups. The communities with least soil moisture were the first to be segregated and with highest soil moisture last. Similarly, the species growing in drier condition was clustered separately from the moisture loving indigenous species. Key words: TWINSPAN; vegetation; inland wetland; India DOI: 10.3126/jowe.v3i0.2433 Journal of Wetlands Ecology, (2009) Vol. 3, pp 23-31

scholarly journals A vegetation survey of the Tsitsikamma Coastal National Park

Koedoe ◽  
1989 ◽  
Vol 32 (1) ◽  
Author(s):  
N. Hanekom ◽  
A. Southwood ◽  
M. Ferguson
Keyword(s):  
Correspondence Analysis ◽  
Indicator Species ◽  
National Park ◽  
Detrended Correspondence Analysis ◽  
Indicator Species Analysis ◽  
Vegetation Survey ◽  
Afromontane Forest ◽  
Species Analysis ◽  
North And South

Sampling plots (5 m x 10 m in fynbos, 10 m x 10 m in forest) were analysed in the littoral, coastal escarpment, and north and south facing inland escarp- ment zones of 17 transect sites along the length of the Tsitsikamma Coastal National Park. Cover- abundance values were estimated for each species in the sampling plots. A detrended correspondence analysis (using CANOCO) and a two way indicator species analysis (TWINSPAN) were carried out on these data to determine the communities sampled. The vegetation of the park was classified into an Afromontane Forest, a Littoral Herbland and two Mesic Mountain Fynbos Communities. The distribution and extent of these communities were determined and their conservation discussed.

scholarly journals Estrutura e relações ambientais de grupos florísticos em fragmento de floresta estacional subtropical

2013 ◽  
Vol 37 (2) ◽  
pp. 275-287 ◽  
Author(s):  
Suzane Bevilacqua Marcuzzo ◽  
Maristela Machado Araújo ◽  
Solon Jonas Longhi
Keyword(s):  
Indicator Species ◽  
Indicator Species Analysis ◽  
M 10 ◽  
Species Analysis ◽  
Em 12

Este estudo teve por objetivos analisar a estrutura de grupos florísticos na vegetação arbórea-arbustiva de um trecho de encosta de Floresta Estacional Subtropical, no Parque Estadual Quarta Colônia, RS, e determinar fatores ambientais importantes na ocorrência das espécies, a fim de subsidiar programas de restauração de áreas degradadas como ecossistema de referência. Para isso, foi realizado estudo fitossociológico em 12 parcelas de 200 m² (10 x 20 m), distantes 20 m entre si, distribuídas sistematicamente em quatro faixas de 100 m entre si, seguindo gradiente de topografia. Em cada parcela foram realizadas a identificação e a medição da circunferência à altura do peito (CAP) e da altura total dos indivíduos arbóreos e arbustivos, ou seja, com CAP > 15 cm, denominado componente arbóreo. Os dados do sub-bosque foram obtidos em parcelas circulares com raio de 1,78 m, instaladas no centro das parcelas de 10 x 20 m, medindo-se indivíduos com altura > 30 cm e CAP <15 cm. As variáveis ambientais foram compostas pela declividade, pela intensidade luminosa, pelas características químicas e textura do solo. Os dados foram analisados segundo a estrutura e diversidade da vegetação por meio da análise de agrupamento pelo método TWINSPAN (Two-way Indicator Species Analysis) e da ordenação pelo método CCA (Análise de Correspondência Canônica). Foi identificada a formação de dois grupos florísticos. A composição de espécies de cada grupo pertence a diferentes estágios de sucessão natural, conforme histórico de uso agrícola, e, segundo suas características funcionais, podem ser indicadas para programas de restauração florestal.

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