Effects of distribution and structural traits of bird's nest ferns (Asplenium nidus) on oribatid (Acari: Oribatida) communities in a subtropical Japanese forest

2006 ◽  
Vol 22 (2) ◽  
pp. 213-222 ◽  
Author(s):  
Shigenori Karasawa ◽  
Naoki Hijii
Keyword(s):  
Species Diversity ◽  
Species Composition ◽  
Subtropical Forest ◽  
Oribatid Mites ◽  
Subtropical Forests ◽  
Number Of Species ◽  
Japanese Forest ◽  
Asplenium Nidus ◽  
Number Of Individuals ◽  
Bird’S Nest Fern

We studied oribatid (Acari: Oribatida) communities in two distinct microhabitats (litter and root) of the bird's nest fern (Asplenium nidus) in an approximately 4-ha area in a subtropical forest, Okinawa, Japan. We collected a total of 15 729 oribatid mites from 37 ferns and examined whether the size and height of the ferns and the distance between ferns affected the structure of the oribatid communities in terms of the species composition, number of individuals, density (individuals per 100 g dry wt of substrate), number of species and species diversity (Simpson's index). Oribatid communities differed significantly in species composition and density between litter and root components and were evenly distributed horizontally throughout the plot. The density of oribatid mites in the litter decreased significantly with increasing height of the ferns, and the species composition and the numbers of individuals and species in the litter were affected by fern size. Our results suggest that the litter and root of bird's nest ferns allowed diverse oribatid communities to become established, and variations in size and height of the ferns may help to maintain or enhance the diversity of oribatid communities in bird's nest ferns in subtropical forests.

Greenhouses of botanical gardens as a habitat of alien and native macrofungi: a case study in Poland

2014 ◽  
Vol 9 (8) ◽  
pp. 777-795
Author(s):  
Andrzej Szczepkowski ◽  
Błażej Gierczyk ◽  
Anna Kujawa
Keyword(s):  
Species Diversity ◽  
Species Composition ◽  
Central Europe ◽  
Botanical Garden ◽  
Botanical Gardens ◽  
Agaricus Subrufescens ◽  
Number Of Species ◽  
Microscopic Features ◽  
Lepiotaceous Fungi

AbstractIn 2010, 16 macrofungi species were found in greenhouses of the Botanical Garden in Warsaw-Powsin. These included 8 species of lepiotaceous fungi and a few species known from warmer areas. For 3 species identified, which are new to Poland (Agaricus subrufescens, Leucocoprinus heinemannii, Marasmius teplicensis), a description is given, with drawings of their microscopic features and photographs. Species composition of macrofungi is compared in 5 complexes of greenhouses (Bayreuth, Graz, Jena, Paskov, Warsaw) in 4 countries from Central Europe. The total number of species in these 5 studies is 206, including 27 (13.2%) lepiotaceous fungi. The smallest number of species identified was in Warsaw (16). More than twice this number was recorded in Jena (33) and Graz (34), while the richest fungal biotas were in Bayreuth (79) and Paskov (88). Of the 16 species found in Warsaw, 8 were also found in other greenhouses. In the group of 33 species recorded in at least two complexes of greenhouses, the most abundant were the lepiotaceous fungi (39.4%) and mycenaceous fungi (15.1%). Leucocoprinus cepistipes and L. straminellus were recorded most often, in 4 of the 5 studied greenhouse complexes. CCA analysis demonstrated that the highest impact on species diversity is the area of greenhouses.

scholarly journals Komunitas Gastropoda Mangrove di Sungai Perpat dan Bunting, Kecamatan Belinyu, Kabupaten Bangka

2021 ◽  
Vol 6 (2) ◽  
pp. 85
Author(s):  
Eka Yuliawati ◽  
Budi Afriyansyah ◽  
Nova Mujiono
Keyword(s):  
Species Composition ◽  
Environmental Change ◽  
Dominant Species ◽  
Mangrove Ecosystem ◽  
Species Number ◽  
Mangrove Area ◽  
Number Of Species ◽  
Mangrove Ecosystems ◽  
Number Of Individuals

<strong>Mangrove gastropod community in Perpat and Bunting Rivers, Belinyu District, Bangka Regency</strong>. Perpat and Bunting in Bangka Regency have an adequate and natural mangrove ecosystems. However, studies on the structure of the gastropod community in this ecosystem is lacking. This study aimed to discover the structure of the gastropod community in the mangrove ecosystem. This study was carried out from October to November 2019 in riverine mangrove area located in Perpat and Bunting Rivers, District Belinyu, Bangka Regency. Samples were taken from 10 x 10 m plot from six observed stations. A total of 578 individuals of gastropoda were collected, comprised of seven families and 14 species. Number of species ranged from 4 to 9, while number of individuals ranged from 35 to 214. <em>Cerithidea quoyii</em> was a dominant species with 270 individuals (47%) and found in all stations. Gastropods community was in labile condition and prone to environmental change. Species composition of gastropods were similar in both rivers with nine identical species. However, epifaunal species were found separately from arboreal species

scholarly journals Influence of elevations on woody tree species diversity in Nam Kar Natural Reserve of Daklak province, Vietnam

2016 ◽  
Vol 8 (2) ◽  
pp. 95-101
Author(s):  
Thi Thanh Huong Nguyen ◽  
Thi Nhu Quynh Chau
Keyword(s):  
Species Diversity ◽  
Species Composition ◽  
Tree Species ◽  
Stand Structure ◽  
Satellite Image ◽  
Landsat 8 ◽  
Tree Species Diversity ◽  
Number Of Species ◽  
Natural Reserve ◽  
Forest Strata

This paper describes the influence of elevation on woody tree species diversity in Nam Kar Natural Reserve of Daklak, of which remote sensing and GIS techniques were used as the tools in biodiversity inventory and assessment. The whole Reserve area was divided into four elevation classes based on DEM (Digital Elevation Model) using GIS technique. Landsat 8 satellite image was employed to stratify the forest into the four strata. A total of 4 transect lines of 100 m in length and 20 m in width (abbreviated as H1, H2, H3, and H4) established in east-west direction representing for 4 elevation classes was used for surveying biodiversity and stand structure. The different diversity indices were compared among the different elevation classes. The relationships between reflectance value of sat- ellite image, forest strata with biodiversity indices were also analysed. The result shows that the diversity of woody tree species is different among elevation classes. Based on sample plots a total of 135 tree species belonging to 42 genera was found in this area. Although a low inverse correlations were found between number of species composition, basal area, and tree density with DNs, most correlation was statistically insignificant 95%. However, a medium relation between forest strata and number of species composition were found with correlation coefficient r = 0.53 (P<0.00) in the area. Nghiên cứu này đánh giá đa dạng thực vật thân gỗ tại khu bảo tồn thiên nhiên Nam Kar theo các cấp độ cao khác nhau. Nghiên cứu đã sử dụng ảnh vệ tinh và kỹ thuật GIS để hỗ trong trong việc điều tra và đánh giá đa dạng sinh học. Toàn bộ khu bảo tồn được chia thành 4 cấp độ cao dựa vào mô hình số độ cao (DEM) được thực hiện bằng kỹ thuật GIS. Ảnh Landsat 8 đã được sử dụng để phân chia rừng thành 4 khối trạng thái. Có 4 ô tiêu chuẩn dạng dải có kích thước 100m chiều dài và 20m chiều rộng được đặt ở từng đai cao (viết tắt là H1, H2, H3, và H4) theo hướng cố định Đông – Tây để điều tra đa dạng sinh học và cấu trúc lâm phần của thực vật thân gỗ ở từng đai cao. Các chỉ số đa dạng sinh học đã được so sánh trong từng cấp độ cao. Mối quan hệ giữa giá trị ảnh, hiện trạng rừng với các chỉ số đa dạng cũng được phân tích. Kết quả nghiên cứu cho thấy có sự khác biệt về đa dạng loài thực vật thân gỗ theo từng đai cao. Dựa vào ô mẫu nghiên cứu cũng đã ước tính có 135 loài thuộc 42 chi có trong vùng nghiên cứu. Một số đặc điểm lâm phần như thành phần loài, tiết diệt ngang bình quân và mật độ cây có mối tương quan nghịch với giá trị ảnh vệ tinh tuy nhiên mối quan hệ này không có ý nghĩa thống kê ở độ tin cậy 95%. Tuy vậy nghiên cứu cho thấy có mối tương quan tương quan khá chặt giữa số loài và các khối hiện trạng rừng với hệ số tương quan là 0.53 ở mức P<0.00.

scholarly journals LOCAL ASPECTS OF REGIONAL DIVERSITY AND DYNAMICS OF MACROPHYTOBENTOS IN THE BLACK SEA (BLUEBAY)

2020 ◽  
Vol 30 (1) ◽  
pp. 18-28
Author(s):  
I.K. Evstigneeva ◽  
I.N. Tankovskaya
Keyword(s):  
Species Diversity ◽  
Species Composition ◽  
Black Sea ◽  
Temporal Dynamics ◽  
Relative Number ◽  
The Black Sea ◽  
Ecological Structure ◽  
Number Of Species ◽  
Functional Features ◽  
Over Time

The species composition, ecological structure, features of phytomass formation and their variability over time are described. The phytocenosis includes 46 macroalgae species of Chlorophyta, Ochrophyta and Rhodophyta phylums. Among the phylums, the highest diversity of species and genera was noted for Rhodophyta. The ecological structure of the phytocenosis is formed by algae from 12 ecogroups, among which marine, leading, annual, and oligosaprobic species dominate. Species of Ochrophyta phylum, and especially representatives of the genus Cystoseira , are most involved in the production process. A peculiarity of the temporal dynamics of the characteristics of the studied phytocenosis is high variability of the species diversity and phytomass of Chlorophyta, as well as the absolute number of species in ecogroups. The biological “norm” is not exceeded for intra-annual changes in the species diversity and phytomass of Ochrophyta, and the relative number of species in phylums and ecogroups. Rhodophyta in this respect is intermediate. Interannual fluctuations in the species composition, in contrast to intra-annual fluctuations, occur with lower intensity. The species proportion of phylums remains constant over time. It was shown that cystosiric phytocenosis, despite the anthropogenic press, retains the basic structural and functional features of macrophytobenthos of the Black Sea.

Phytoplankton species diversity of the Lower Vistula from Wyszogród to Toruń

2009 ◽  
Vol 38 (4) ◽  
Author(s):  
Ewa Dembowska
Keyword(s):  
Species Diversity ◽  
Species Composition ◽  
Growing Season ◽  
Middle Part ◽  
Phytoplankton Species ◽  
River Section ◽  
Dam Reservoir ◽  
Water Flow Velocity ◽  
Number Of Species ◽  
Phytoplankton Species Composition

Phytoplankton species diversity of the Lower Vistula from Wyszogród to ToruńIn this paper, the results of research on phytoplankton species composition along the 145 km section of the Lower Vistula are presented. The research was carried out during the growing season in 1998. All sites were located in the mainstream, both in the river and in the dam reservoir, which is situated in the middle part of the studied river section. As regards the number of species, diatoms and green algae were the most numerous. Most of the species were identified at the site located above the dam reservoir. The fewest number of species were identified at the sites below the reservoir. Damming the river, and therefore changing the water flow velocity, had a clear effect on the species composition and diversity of plankton algae.

By-catch from Praen trawling in the Hawkesbury River, New South Wales: Species Composition, distribution and Abundance

1990 ◽  
Vol 41 (1) ◽  
pp. 13 ◽  
Author(s):  
CA Gray ◽  
VC McDonall ◽  
DD Reid
Keyword(s):  
Species Composition ◽  
New South ◽  
New South Wales ◽  
Spatial And Temporal Variability ◽  
Composition Distribution ◽  
Number Of Species ◽  
South Wales ◽  
By Catch ◽  
Autumn And Winter ◽  
Number Of Individuals

This study examined spatial and temporal variability in the composition, distribution and relative abundance of by-catch from prawn trawl sampling in the Hawkesbury River, New South Wales. It also determined whether there were differences in the fauna between sections of the river that are open and closed to prawn trawling. By-catch was sampled monthly between March 1986 and February 1988 in three areas along the river that differed in distance from the mouth of the estuary and in salinity. The total incidental catch comprised 75 species of fish, 13 species of crustaceans and 5 species of molluscs: 42 species were commercially and/or recreationally important. Classification and ordination analyses showed that the species composition of the by-catch differed between the area closest to the mouth of the estuary and that furthest upstream, and that this difference was relatively consistent throughout time. The number of species in the by-catch decreased with increasing distance upstream. Annual and seasonal changes in the number of species were similar in all areas along the river: more species were caught in 1987 than in 1986, and in autumn and winter each year. In contrast, the number of individuals caught differed among areas and these differences varied between years. Similarly, seasonal fluctuations in the numbers of individuals caught varied between years, but these variations were similar in all areas. In the area furthest upstream there were no apparent differences in the numbers of species and individuals caught by prawn trawl sampling in sections of the river open or closed to prawn trawling.

scholarly journals NEW DATA ABOUT THE FAUNА OF ORIBATID MITES (ORIBATIDA) OF THE NORTH CAUCASUS

2018 ◽  
Vol 13 (2) ◽  
pp. 52-63
Author(s):  
Umukusum Ya. Shtanchaeva ◽  
Luis S. Subias ◽  
Aleksandr M. Kremenitsa
Keyword(s):  
Species Diversity ◽  
Salt Marshes ◽  
Steppe Zone ◽  
Oribatid Mites ◽  
North Caucasus ◽  
Forest Zone ◽  
Subalpine Meadows ◽  
Number Of Species ◽  
The North ◽  
First Time

The purpose of this work is to publish new data on the species composition of oribatid mites in the North Caucasus, which will make possible to clarify the destribution of the oribatids of the world fauna region. The material was collected in 2003-2009, according to generally accepted methods, in 23 habitats in the territory of Adygea, Dagestan, Kabardino-Balkaria and the Krasnodar Territory in various altitudinal levels: in alpine and subalpine meadows, in mountain forests of various types (birch, pine, beech or mixed), mesophytic meadows in the forest zone, in xerophytic shrubs and mountain steppes, floodplain meadows and salt marshes of the semidesert biotopes of the lowland zone. Results. There were found 349 species of the oribatid mites from 158 genera and subgenera belonging to 62 families. Forest habitats are characterized by the greatest species diversity, there are found 232 species of oribatids. In the alpine and subalpine meadows 158 species are noted, 71 species are found in the mountain steppe zone, 47 species in the salt marshes of the semidesert zone, and 7 species in the floodplain meadows. For the first time in the Caucasian region one genus Novosuctobelba Hammer, 1977 and 29 species of the oribatid mites are registered, founded earlier only in Japan, China, Somalia and some countries of the Mediterranean. There are 14 new taxa for science: 12 species and 2 subspecies. Conclusion. In 23 biotopes of 18 geographical points of the Northern Caucasus 349 species of the oribatid mites from 158 genera and subgenus and 62 families were found. The number of species found in the biotopes of different altitude zones corresponds to the basic patterns of distribution of oribatids in mountain ecosystems: the biotopes of the forest zone are characterized by the greatest species diversity, the number of species in the soils of alpine and subalpine meadows and biotopes of the mountain-steppe zone is somewhat lower, the smallest number of species is found in the semidesert zone. For the first time in the Caucasian region one genus and 29 species of oribatid have been recorded, which allows to expand the areology of some species of the oribatid mites. There are 14 new taxa for science.

Spatial Heterogeneity of Littoral Fish Assemblages in Lakes: Relation to Species Diversity and Habitat Structure

1992 ◽  
Vol 49 (7) ◽  
pp. 1493-1500 ◽  
Author(s):  
Barbara J. Benson ◽  
John J. Magnuson
Keyword(s):  
Species Diversity ◽  
Species Composition ◽  
Spatial Heterogeneity ◽  
Fish Community ◽  
Fish Assemblages ◽  
Randomization Test ◽  
Data Matrix ◽  
Depth Gradient ◽  
Fish Species Composition ◽  
Number Of Individuals

We quantified the spatial heterogeneity in nearshore fish community composition within six Wisconsin lakes and examined its relation to habitat heterogeneity and species diversity. Fish abundance was estimated annually (1981–84) using seines at six sites in each lake. Substrate type, macrophyte growth form, and depth gradient were noted at each site. Species richness was estimated as the expected number of species when the number of individuals was held constant over lakes (rarefaction). Fish community spatial heterogeneity (the average percent dissimilarity in fish species composition over all possible pairs of seine sites within a lake) differed among lakes; it was positively correlated with within-lake variation in the depth gradient and with species diversity as estimated by rarefaction. We tested whether differences in community spatial heterogeneity among lakes resulted simply from differences in species diversity using a randomization test based on random permutations of the rows (seine hauls) in the species composition data matrix. Lakes differed in the extent to which the observed community heterogeneity exceeded the randomization results. Spatial heterogeneity of the fish community, as opposed to sampling phenomena resulting from differences in richness, was a strong factor in some lakes.

ICHTHYOFAUNA OF THE OB RIVER AND ITS FLOODPLAIN IN THE OKTYABRSKY DISTRICT OF THE KHANTY-MANSI AUTONOMOUS OKRUG-YUGRA

2021 ◽  
Author(s):  
Владимир Сергеевич Шкиндер ◽  
Наталья Васильевна Смолина
Keyword(s):  
Species Diversity ◽  
Species Composition ◽  
Ob River ◽  
Number Of Species ◽  
Khanty Mansi Autonomous ◽  
Carp Fish

В статье рассмотрен видовой состав уловов в Октябрьском районе Ханты-Мансийского округа - Югры в 2020-2021 гг. Совокупно в промышленных, любительских и браконьерских уловах отмечено 23 вида из 9 семейств. Набольшее видовое разнообразие отмечено в русле и протоках Оби (соответственно 18 и 20 видов). По числу видов и объемам добычи в любительском и промышленном рыболовстве лидируют карповые рыбы. The article considers the species composition of catches in the Oktyabrsky district of the Khanty-Mansiysk district - Yugra in 2020-2021. In total, 23 species from 9 families were recorded in industrial, amateur and poaching catches. The greatest species diversity was noted in the riverbed and channels of the Ob (18 and 20 species, respectively). In terms of the number of species and production volumes, carp fish are the leaders in amateur and industrial fishery.

scholarly journals An account of snake specimens in St. Joseph’s College Museum Kozhikode, India, with data on species diversity

2020 ◽  
Vol 12 (11) ◽  
pp. 16622-16627
Author(s):  
V.J. Zacharias ◽  
Boby Jose
Keyword(s):  
Species Diversity ◽  
Species Composition ◽  
Naja Naja ◽  
The Common ◽  
Number Of Individuals ◽  
Zoology Department

This paper presents details of the snake collection in the museum of the Zoology Department, St Joseph’s College, Devagiri, Kozhikode and provides data to assess the diversity and abundance of snake fauna in the Kozhikode area of Kerala. Twenty-four species of snakes in five families are vouchered for Kozhikode region. The number of individuals catalogued in St. Josephs College collection serves as an approximate indicator of the species composition of snake fauna of the area and offers a proxy to the measure of snake abundance at Kozhikode. The most abundant well collected species in the collection was the Common Cobra, Naja naja.  

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