INFLUÊNCIA DO TAMANHO DE PARCELA NO CÁLCULO DA DISTRIBUIÇÃO ESPACIAL DE Anadenanthera peregrina (L.) Speng. E Apuleia leiocarpa J. F. Macbr EM UMA FLORESTA ESTACIONAL SEMIDECIDUAL

Objetivou-se com este estudo avaliar o comportamento dos índices de distribuição espacial das espécies Anadenanthera peregrina e Apuleia leiocarpa, em diferentes tamanhos de parcelas. Realizou-se um censo na Mata da Silvicultura, localizada em Viçosa, M.G. por meio do qual todos indivíduos das duas espécies, com DAP ≥ 20 cm, foram medidos e georreferenciados. Os dados foram agrupados em unidades amostrais de (10x10) m², (10x30) m², (10x50) m², (20x10) m², (20x30) m² e (20x50) m². O padrão de distribuição espacial das espécies foi identificado por meio dos índices de Payandeh (Pi), MacGuinnes (IGAi), Fracker e Brischle (Ki) e Morisita (IMi). Posteriormente, para cada tamanho de unidade amostral, selecionou-se aleatoriamente 10% do número total de parcelas e os índices foram calculados. Foram realizadas 10 repetições desse procedimento e a análise da distribuição espacial foi feita com base na média dos valores encontrados. O IGAi, Pi, e Ki foram diretamente proporcionais a área das parcelas e o IMi, inversamente proporcional. O IGAi apresentou as menores diferenças entre as médias das amostragens e os valores reais aferidos pelo censo. Diante disso, o IGAi foi o índice mais adequado para se estudar a distribuição espacial das espécies.Palavra-chave: análise espacial de árvores, índice de Morisita, agregação. PLOT SIZE INFLUENCE IN THE SPATIAL DISTRIBUTION CALCULATION OF Anadenanthera peregrina (L.) Speng. AND Apuleia leiocarpa J. F. Macbr IN SEMIDECIDUOUS SEASONAL FOREST ABSTRACT:The objective of this study was to evaluate the behavior of spatial distribution indexes of the species Anadenanthera peregrina and Apuleia leiocarpa, in different plot sizes. A forest census was carried out in the Mata da Silvicultura, located in Viçosa, M.G. through which all individuals of both species, with DBH ≥ 20 cm, were measured and georeferenced. The data were grouped into sampling units of (10x10) m², (10x30) m², (20x10) m², (20x10) m² and (20x50) m². The spatial distribution pattern of the species was identified through the Payandeh (Pi), MacGuinnes (IGAi), Fracker and Brischle (Ki) and Morisita (IMi) indexes. Subsequently, for each sampling unit size, 10% of the total number of plots were randomly selected and the indexes were calculated. Ten replicates of this procedure were perfomed and the spatial analysis was done based on the average of the values found. The IGAi, Pi, and Ki were directly proportional to the plot area and the IMi, inversely proportional. The IGAi presented the smallest differences between the sampling means and the real value measured by the census. Noted that, it was clear that the IGAi was the most adequate index to study a spatial distribution of the species.Keywords: tree spatial analysis, Morisita Index, aggregation. DOI:

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Ecological and environmental indicators of Brazil Nut Tree (Bertholletia excelsa Bonpl.) in Flona do Jamari, Rondônia

Revista Ibero-Americana de Ciências Ambientais ◽

10.6008/cbpc2179-6858.2020.007.0056 ◽

2020 ◽

Vol 11 (7) ◽

pp. 740-751

Author(s):

Nilson Reinaldo Fernandes dos Santos Júnior ◽

Diogo Martins Rosa ◽

José Das Dores de Sá Rocha ◽

Marta Silvana Volpato Sccoti ◽

Scheila Cristina Biazatti ◽

...

Keyword(s):

Spatial Distribution ◽

Distribution Pattern ◽

Geographic Location ◽

Distribution Patterns ◽

Environmental Indicators ◽

Diameter Distribution ◽

Brazil Nut ◽

Productive Potential ◽

Morisita Index ◽

Individual Trees

Mapping Brazil nut trees in the Amazon is essential for indicating its distribution patterns within different ecosystems, while also being useful to estimate the species productive potential. This study aimed to evaluate the spatial distribution of Brazil nut trees in Flona do Jamari – RO, considering its environmental and topographic conditions. A census was performed for all individual trees sized ≥ 35 cm in diameter at 1.30 m breast height (DBH) above the ground of six Annual Production Units (APU) in Forest Management Unit III (FMU-III), a 11,011.2 ha area of Flona do Jamari, RO. DBH and geographic location (GPS) were collected for each tree. Structure and diameter distribution were evaluated by abundance, density, dominance, and frequency. The Morisita index was used to identify the spatial distribution pattern. The environment was defined by the local relative height found along the drainage network, by the digital model Height Above the Nearest Drainage (HAND). Most trees were among DBH intermediate classes (60 to 140 cm), and only a few were young trees (DBH < 50 cm). Brazil nut trees present a random spatial distribution and a predominant distribution pattern of 'terra-firme (solid ground)'. Such information on the species structural, spatial, and ecological patterns serve as key elements for further studies on production potential.

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Spatial Spread of Invasive Foreign Plants Clidemia hirta (L.) D. Don in Bung Hatta Forest Park, Padang, West Sumatra

JURNAL BIOLOGI UNAND ◽

10.25077/jbioua.7.2.136-141.2019 ◽

2019 ◽

Vol 7 (2) ◽

pp. 136

Author(s):

Rian Anggraini ◽

Solfiyeni Solfiyeni

Keyword(s):

Spatial Distribution ◽

Light Intensity ◽

Distribution Pattern ◽

Spatial Spread ◽

Forest Park ◽

The Road ◽

West Sumatra ◽

Belt Transect ◽

Morisita Index ◽

Number Of Individuals

Research on Spatial Spread of Invasive Foreign Plants Clidemia hirta in Bung Hatta Forest Park, Padang, West Sumatra, has been carried out from January to June 2018. The purpose of this study was to determine the spatial distribution pattern of invasive foreign plants Clidemia hirta and analyze the influence of distance from roads and influence light intensity on the distribution of the number of individuals Clidemia hirta in the Bung Hatta Forest Park. This study uses a belt transect method with a width of 2 meters along 250 meters. Along the transect, a plot of 2x2 meters was made with 125 plots. Observations made on Clidemia hirta is to calculate the number of individuals and measure the intensity of light in each plot. The results showed that the pattern of spread of Clidemia hirta was grouped with the Morisita Index of 2.1. The distance from the road and the intensity of light does not affect the distribution of the number of individuals with R Square values of 0.022 and 0.007, respectively.

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Study on Pseudolarix amabilis Population Spatial Distribution Pattern

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.485.221 ◽

2012 ◽

Vol 485 ◽

pp. 221-224 ◽

Cited By ~ 1

Author(s):

Ren Yan Duan ◽

Min Yi Huang ◽

Fei Lin ◽

Yue Zhang

Keyword(s):

Spatial Distribution ◽

Diffusion Process ◽

Distribution Pattern ◽

Spatial Patterns ◽

Field Data ◽

Spatial Distribution Pattern ◽

Morisita Index ◽

Pattern Scale ◽

Population Spatial Distribution ◽

Peak Value

Field data were sampled by the method of contiguous grid quadrate. The spatial patterns of Pseudolarix amabilis populations were studied by the following methods: DispItalic textersal index (C), David moores index (I), Lloyd index (m*/m), Morisita index (Iδ), Parameter of negative index (K) and Cassie index (1/K). The quadrate variance analysis, Greig-Smith and Kershaw methods were used to study the spatial distribution pattern, pattern scale and pattern intensity of Pinus armandi population at different sizes. The result showed that P. amabilis population is most clumped. The result indicated the pattern intensity was decreasing with the size increasing and a single peak value appeared in the curve with the area increasing. There was a slow change in the pattern intensity of population, which means a smaller variation in environment and a bigger difference in the relative density of population patches during diffusion process.

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Sampling Unit, Spatial Distribution of Trees, and Precision

Northern Journal of Applied Forestry ◽

10.1093/njaf/9.1.3 ◽

1992 ◽

Vol 9 (1) ◽

pp. 3-6 ◽

Cited By ~ 7

Author(s):

Robin M. Reich ◽

Loukas G. Arvanitis

Keyword(s):

Spatial Distribution ◽

Sample Size ◽

Spatial Patterns ◽

Basal Area ◽

Sampling Unit ◽

Sample Variance ◽

Plot Size ◽

Plot Area ◽

The Relationship

Abstract The relationship between plot size and sample variance as affected by the spatial patterns of trees, volume, and basal area is reported. This information is useful for practicing foresters in determining the best combination of sample size, plot area, or basal area factor in forest surveys. North. J. Appl. For. 9(1):3-6.

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Content and Distribution of Lead in Household Dust near a Smelter in Yunnan

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.807-809.688 ◽

2013 ◽

Vol 807-809 ◽

pp. 688-693

Author(s):

Jing Xie ◽

Hong Guang Cheng ◽

Xue Lian Liu ◽

Lin Wang

Keyword(s):

Adverse Effect ◽

Spatial Distribution ◽

Spatial Analysis ◽

Distribution Pattern ◽

Environmental Quality ◽

Radial Distribution ◽

Quality Standard ◽

Indoor Dust ◽

Smelting Process ◽

Household Dust

The aim of this study was to investigate lead (Pb) level and spatial distribution pattern in the household dust around a smelter in Yunnan. The Pb content in the dust ranges from 191~13371mg/kg, with significant differences among the investigated villages, and 89.33% of the samples exceed the secondary limit of Chinese Soil Environmental Quality Standard for Pb. Spatial analysis shows that the pollution center was close to CH-co, and the radial distribution pattern is consistent with the predominant wind derection. The investigation proved that, lead emitted from the smelting process via atomospheric deposit is the main source of the Pb in the indoor dust, which may cause a potential adverse effect on people in the studying district.

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KEPADATAN DAN POLA PENYEBARAN PASAK BUMI (Eurycoma longifolia Jack) DI ZONA ALAMAN KUYANG, HUTAN LARANGAN ADAT KENEGARIAN RUMBIO

JURNAL AGROTEKNOLOGI ◽

10.24014/ja.v6i1.1375 ◽

2016 ◽

Vol 6 (1) ◽

pp. 41 ◽

Cited By ~ 1

Author(s):

ZULFAHMI ZULFAHMI ◽

NELAWATI NELAWATI ◽

ROSMAINA ROSMAINA

Keyword(s):

Distribution Pattern ◽

Sampling Method ◽

Forest Reserve ◽

Purposive Sampling ◽

Eurycoma Longifolia ◽

Plot Size ◽

Eurycoma Longifolia Jack ◽

Morisita Index ◽

Index Value ◽

Made In

The objective of this research was to know the density and distribution pattern of E. longifolia in the Alaman Kuyang zone of the forest reserve of Kenegerian Rumbio. The research used purposive sampling method. The observation plot is made in square plot which plot size was 20 x50 m. Results of this study showed that density of E. longifolia in Alaman Kuyang zone of forest reserve of Kenegarian Rumbio was 130 individual ha-1, which seedling phase is more dominance than sapling and pole phases. The density of E.longifolia was low due to increasing the harvesting of this species from forest reserve of Kenegarian Rumbio, and addition poor of mother trees in area study. Distribution pattern of E. longifolia were clumped with Morisita Index value > 1, this could be explained since seed of E. longifolia dispersed and grew not far from mother trees.

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The intertidal gastropods (Gastropoda: Mollusca) diversity and taxa distribution in Alas Purwo National Park, East Java, Indonesia

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d200731 ◽

2019 ◽

Vol 20 (7) ◽

Author(s):

SUSINTOWATI SUSINTOWATI ◽

NYOMAN PUNIAWATI ◽

ERNY POEDJIRAHAJOE ◽

NIKEN SATUTI NUR HANDAYANI ◽

SUWARNO HADISUSANTO

Keyword(s):

Spatial Distribution ◽

Distribution Pattern ◽

National Park ◽

Diversity Index ◽

Principal Component ◽

Spatial Distribution Pattern ◽

Intertidal Zones ◽

Diverse Environment ◽

Morisita Index ◽

Diversity Profile

Abstract. Susintowati, Puniawati N, Poedjirahajoe, Handayani NSN, Hadisusanto S. 2019. The intertidal gastropods (Gastropoda: Mollusca) diversity and taxa distribution in Alas Purwo National Park, East Java, Indonesia. Biodiversitas 20: 2016-2027. Gastropods play an essential role in the ecosystem and can be used as bioindicators of environmental pollution. Understanding of their behavior, habitat, and distribution, and how these factors evolve, is crucial. This paper aimed to describe the diversity of the gastropod community and their spatial taxa distribution, based on the specimen frequency across all observed samples, in the diverse environment of Alas Purwo National Park (APNP), East Java, Indonesia. We studied eight beaches and two mangroves areas, and the study areas of the intertidal zone divided into upper, middle, and lower zones towards the sea. The purposive sampling was used to determine the locations and multi-plot quadrats for observations. The diversity of gastropods was elucidated by using the Shannon and Simpson indexes, while the Morisita index was applied for analyzing their spatial distribution pattern. However, the correspondence analysis and principal component analysis were performed using the software of PAST 3.22 for describing the diversity profile and individual rarefaction of gastropods together with environmental quality. There were three beach types: rocky, sandy, and muddy beaches were found in APNP. The highest diversity index (H’) was found on Pancur beach: H’ = 3.271, D = 0.947 of 67 species. The spatial distribution pattern of gastropods species was weakly clumped to random, with Ip: 0.165 - 0.016. Gastropods, both predators and scavengers, were distributed from the upper to lower zones. The distribution of gastropods in APNP is mostly in type B. These results expand our knowledge of gastropods diversity and distribution of Indonesia’s beach and can contribute to the future environmental assessments of biodiversity of tropical intertidal zones worldwide.

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