scholarly journals Invertebrate Community Similarity in the Nglambor Intertidal Zone, Indonesia

2021 ◽  
Vol 33 ◽  
pp. 01003
Author(s):  
Yoga Putra Aliyani ◽  
Yunita Fera Rahmawati ◽  
Millade Annisa Muflihaini
Keyword(s):  
Intertidal Zone ◽  
Abiotic Factors ◽  
Species Conservation ◽  
Habitat Utilization ◽  
Community Similarity ◽  
Invertebrate Community ◽  
Habitat Types ◽  
Invertebrate Communities ◽  
Water Ph ◽  
Cluster Dendrogram

This study aims to investigate the community composition similarity of invertebrates in the Nglambor intertidal zone. The similarity of invertebrate communities in the Nglambor intertidal zone in Indonesia was studied in August and September 2020.. The data of occurring invertebrates and algae were obtained by plot method. Abiotic factors such as water pH, light intensity, and salinity were measured at each station. The similarity in invertebrate communities among habitat types was determined using the Dice’s coefficient, meanwhile to estimate similarities in habitat utilization we use Jaccard’s coefficient in PAST 4 software. Both invertebrate community similarity and habitat utilization were displayed in an cluster dendrogram. A total of five phyla was recorded, comprising Annelida, Arthropoda, Echinodermata, Mollusca and Nemertea. Algae cover varies from each station with the average cover reaches 52%. The result of the cluster analysis showed different models of invertebrate community similarity and habitat use that may be used for species conservation.

scholarly journals Riparian Vegetation Structure Influences Terrestrial Invertebrate Communities in an Agricultural Landscape

Water ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 188
Author(s):  
Cristina Popescu ◽  
Mihaela Oprina-Pavelescu ◽  
Valentin Dinu ◽  
Constantin Cazacu ◽  
Francis J. Burdon ◽  
...  
Keyword(s):  
Riparian Vegetation ◽  
Human Impacts ◽  
Agricultural Landscapes ◽  
Riparian Buffers ◽  
Management Tool ◽  
Potential Contribution ◽  
Invertebrate Community ◽  
Invertebrate Communities ◽  
Terrestrial Invertebrate ◽  
Invertebrate Diversity

Stream and terrestrial ecosystems are intimately connected by riparian zones that support high biodiversity but are also vulnerable to human impacts. Landscape disturbances, overgrazing, and diffuse pollution of agrochemicals threaten riparian biodiversity and the delivery of ecosystem services in agricultural landscapes. We assessed how terrestrial invertebrate communities respond to changes in riparian vegetation in Romanian agricultural catchments, with a focus on the role of forested riparian buffers. Riparian invertebrates were sampled in 10 paired sites, with each pair consisting of an unbuffered upstream reach and a downstream reach buffered with woody riparian vegetation. Our results revealed distinct invertebrate community structures in the two site types. Out of 33 invertebrate families, 13 were unique to either forested (6) or unbuffered (7) sites. Thomisidae, Clubionidae, Tetragnathidae, Curculionidae, Culicidae, and Cicadidae were associated with forested buffers, while Lycosidae, Chrysomelidae, Staphylinidae, Coccinellidae, Tettigoniidae, Formicidae, and Eutichuridae were more abundant in unbuffered sites. Despite statistically equivocal results, invertebrate diversity was generally higher in forested riparian buffers. Local riparian attributes significantly influenced patterns in invertebrate community composition. Our findings highlight the importance of local woody riparian buffers in maintaining terrestrial invertebrate diversity and their potential contribution as a multifunctional management tool in agricultural landscapes.

scholarly journals Effect of Environmental Factors on the Germination and Emergence of Drunken Horse Grass (Achnatherum inebrians)

Weed Science ◽  
2020 ◽  
pp. 1-29
Author(s):  
Yonghuan Yue ◽  
Guili Jin ◽  
Weihua Lu ◽  
Ke Gong ◽  
Wanqiang Han ◽  
...  
Keyword(s):  
Seed Germination ◽  
Environmental Factors ◽  
Abiotic Factors ◽  
Seedling Emergence ◽  
Management Strategies ◽  
Germination Percentage ◽  
Western China ◽  
Burial Depth ◽  
Achnatherum Inebrians ◽  
Water Ph

Abstract Drunken horse grass [Achnatherum inebrians (Hance) Keng] is a perennial poisonous weed in western China. A comprehensive understanding of the ecological response of A. inebrians germination to environmental factors would facilitate the formulation of better management strategies for this weed. Experiments were conducted under laboratory conditions to assess the effects of various abiotic factors, including temperature, light, water, pH and burial depth, on the seed germination and seedling emergence of A. inebrians. The seeds germinated at constant temperatures of 15, 20, 25, 30, 35°C and in alternating-temperature regimes of 15/5, 20/10, 25/15, 30/20, 35/25, 40/30°C, and the seed germination percentages under constant and alternating temperatures ranged from 51% to 94% and 15% to 93%, respectively. Maximum germination occurred at a constant temperature of 25°C, and germination was prevented at 45/35°C. Light did not appear to affect seed germination. The germination percentage of seeds was more than 75% in the pH range of 5 to 10, with the highest germination percentage at pH 6. The seeds germinated at osmotic potentials of 0 MPa to -1.0 MPa, but decreasing osmotic potential inhibited germination, with no germination at -1.2MPa. After 21 d of low osmotic stress, the seeds that did not germinate after rehydration had not lost their vitality. The seedling emergence percentage was highest (90%) when seeds were buried at 1 cm but declined with increasing burial depth and no emergence at 9 cm. Deep tillage may be effective in limiting the seed germination and emergence of this species. The results of this study provide useful information on the conditions necessary for A. inebrians germination and provide a theoretical basis for science-based prediction, prevention and control of this species.

The effect of agriculture on cave-stream invertebrate communities

2017 ◽  
Vol 68 (11) ◽  
pp. 1999 ◽  
Author(s):  
Pierce M. McNie ◽  
Russell G. Death
Keyword(s):  
Land Use ◽  
Land Use Changes ◽  
Ecological Health ◽  
Land Use Impacts ◽  
Invertebrate Community ◽  
Forested Catchments ◽  
Invertebrate Communities ◽  
Agricultural Catchments ◽  
Stream Communities ◽  
The Relationship

The impacts that land-use changes have on cave-stream fauna have not been considered widely in the investigations of land-use impacts on stream ecology. The present study examines how above-ground agriculture may influence cave-stream invertebrate communities. The invertebrate communities in four cave streams and their surface counterparts were sampled in 2014–2015, including two drained predominantly agricultural catchments and two drained forested catchments. These communities were examined alongside habitat and GIS land-use data to determine the relationship between above-ground land use and the stream communities. Invertebrate community composition and ecological health for surface streams was different between the agricultural and forest catchments. These differences were less pronounced within the cave-stream communities. Sedimentation was the principal agricultural stressor in the cave streams. The overall effects of agriculture were lower within the cave streams than on the surface; this is likely to be due to the reduced number of potentially deleterious stressors on cave streams.

scholarly journals Studi Adaptasi Notochelys platynota Jantan dan Betina di Area Konservasi Ex-situ Universitas Bengkulu

2019 ◽  
Vol 3 (1) ◽  
pp. 8-13
Author(s):  
Elvida Sari Yunilarosi ◽  
Aceng Ruyani ◽  
Wiryono Wiryono
Keyword(s):  
Air Temperature ◽  
Soil Ph ◽  
Ex Situ Conservation ◽  
Abiotic Factors ◽  
Carapace Width ◽  
Ex Situ ◽  
Abiotic Factor ◽  
Water Spinach ◽  
Conservation Area ◽  
Water Ph

AbstraCT[Adaptation Study of Male and Female Notochelys Platynota in Ex-situ Conservation Area University of Bengkulu]. The purposes of this research were to compare the growth of male N. platynota and female N. platynota, and to know the condition of abiotic factors in ex-situ conservation area at the University of Bengkulu. Nine N. platynotas consisting of four males and five females were kept individually in three cages, each of which consisting of three spaces. Cages were placed at three different spots in the ex-situ conservation area of Bengkulu University. N. platynota was fed with water spinach (Ipomea aquatica) as much as 10% of their body weight, every two days. Data collection was done once a week for five weeks. The data were analyzed to determine: a) weight growth, b) body-thick growth, c) growth of carapace length, d) growth of carapace width, e) growth of plastron length, f) growth of plastron width, and g) environmental factors (air temperature, soil temperature, water pH, soil pH, and humidity. The results showed that: a) N. platynota males experienced a growth of 5.04% higher than the female N. platynota, i.e.only 2.26%, b) the abiotic factor conditions of habitat of N. platynota were the followings: air temperature 30.8ºC, ground temperature 31.8ºC, soil pH 5.1, water pH 7.5 and relative humidity 71.2%. Based on the data of N. platynota growth and abiotic factor condition, it can be concluded that the ex-situ conservation area of Bengkulu University is suitable to be the new habitat for N. platynota. Keywords: Adaptation; ex-situ conservation; growth; notochelys platynota.(Received August 13, 2018; Accepted January 8, 2019; Published February 25, 2019) ABSTRAKPenelitian ini bertujuan untuk: a) membandingkan pertumbuhan Notochelys platynota jantan dan N. platynota betina, (b) mengetahui kondisi faktor abiotik di area konservasi ex-situ Universitas Bengkulu. Sembilan ekor N. platynota yang terdiri dari empat ekor jantan dan lima ekor betina dipelihara secara individu dalam tiga keramba yang terdiri atas tiga plot pada masing-masing keramba.  Keramba di letakkan pada tiga titik berbeda di area konservasi ex-situ Universitas Bengkulu. N. platynota diberi pakan berupa  Kangkung (Ipomea aquatiqa) sebanyak 10% dari berat badan, pemberian pakan dilakukan setiap dua hari sekali. Pengambilan data dilakukan setiap satu kali seminggu selama lima pekan. Data dianalisis untuk mengetahui: (a) pertumbuhan berat badan, (b) pertumbuhan tebal badan, (c) pertumbuhan panjang karapaks, (d) pertumbuhan lebar karapaks, (e) pertumbuhan panjang plastron, (f) pertumbuhan lebar plastron, (g) faktor lingkungan abiotik (suhu air, suhu udara, pH air, pH tanah dan kelembaban udara). Hasil penelitian menunjukkan bahwa: (a) N. platynota jantan mengalami pertumbuhan sebesar 5.04%. lebih tinggi dari pada pertumbuhan N. platynota betina yaitu 2.26% (b) Kondisi faktor abiotik yang menjadi habitat N. platynota antara lain dengan rata-rata: suhu udara 30.8ºC, suhu tanah 31.8ºC, pH tanah 5.1, pH air 7.5 dan kelembaban udara 71.2%. Berdasarkan data hasil pengamatan pertumbuhan N. platynota dan kondisi faktor abiotiknya, dapat di katakan bahwa area konservasi ex-situ Universitas Bengkulu sudah cocok untuk dijadikan habitat baru bagi N. platynota. Kata Kunci: Adaptasi; konservasi ex situ; pertumbuhan; Notochelys platynota.

scholarly journals Community structure of benthic macroinvertebrate fauna of river Ichamati, India

2018 ◽  
Vol 10 (8) ◽  
pp. 12044
Author(s):  
Arnab Basu ◽  
Indrani Sarkar ◽  
Siddartha Datta ◽  
Sheela Roy
Keyword(s):  
Benthic Community ◽  
Diversity Index ◽  
Abiotic Factors ◽  
Benthic Invertebrate ◽  
Benthic Macroinvertebrate ◽  
Macroinvertebrate Communities ◽  
Habitat Conditions ◽  
Invertebrate Communities ◽  
Benthic Invertebrate Communities ◽  
Hydrological Variables

Benthic macroinvertebrate communities are frequently applied as indicators of aquatic ecosystem health as many species are responsive to pollution and abrupt changes in their surroundings.  The qualities of benthic invertebrate communities greatly depend on habitat conditions.  Thus the diversity in benthic community varies with different habitat conditions.  This investigation on the structure of the benthic invertebrate communities was conducted on river Ichamati, a trans-boundary river between India and Bangladesh to assess the cumulative effects of water quality on the aquatic biota.  The study period extended from February 2011 to January 2014 at three sites from Majdiah to Hasanabad (in West Bengal, India) a stretch of 124km.  A total of 23 macrobenthic species belonging to three phyla, five classes and nine orders were identified.  Fifteen species of benthic invertebrates belonging to Mollusca, three species under Annelida and five species under Arthropoda were found.  The highest abundance density (3633.33 indiv.m-2) and species richness (18 species) were recorded up-stream (Majdiah) where marginal habitats covered by macrophytes were significantly higher than at other sites.  Both the organic carbon (4.41±1.11) and organic matter (7.48±1.56) of soil at this site were the maximum thus influencing the richness of benthic macroinvertebrate communities.  Hydrological variables, viz, dissolved oxygen, pH, alkalinity; hardness, salinity, nutrients, calcium, and magnesium were studied to determine their influences on the benthic community in the upper, middle- and down-streams of the river, respectively.  Shannon’s diversity index (0.95–2.07; 0.00–0.72; 0.00–0.64), dominance index (0.57–0.86; 0.00–0.44; 0.00–0.44), evenness index (0.72–0.95; 0.61–1.00; 0.00–1.00), Margalef index (0.72–2.23; 0.00–1.32; 0.00-0.28) of the upper, middle- and down-streams were calculated. Benthic macroinvertebrate density was correlated with hydrological variables which indicated that the abiotic factors had either direct or inverse influence on the richness and abundance; however, the abiotic factors did not correlate identically in all three sites. 

scholarly journals Structure of molluscan assemblages in sheltered intertidal unconsolidated environments

2005 ◽  
Vol 48 (5) ◽  
pp. 825-839 ◽  
Author(s):  
Márcia Regina Denadai ◽  
Antonia Cecilia Zacagnini Amaral ◽  
Alexander Turra
Keyword(s):  
Abiotic Factors ◽  
Negative Relationship ◽  
Direct Consequence ◽  
Intertidal Habitat ◽  
Habitat Types ◽  
Mean Grain Size ◽  
Negative Effect ◽  
Molluscan Fauna ◽  
The Mean ◽  
Molluscan Assemblage

The molluscan macrofauna from 13 oceanic sheltered intertidal unconsolidated environments and its relationship with abiotic factors were studied in order to establish the degree of species richness and to understand the role environment plays in structuring such assemblages. Four distinct intertidal habitat types were recognized based on molluscan assemblage descriptors (diversity, richness and density) and abiotic characteristics. The mean grain size (in phy units) and the beach slope showed a negative relationship with the diversity, richness and density. Coarser sediments were favorable to molluscan fauna in the study areas, contrasting the well-known negative effect of this type of sand on fauna in typical oceanic beaches. The low-tide terraces, typical from tide-dominated areas, and the presence of physical (rocky fragments) and biogenic (gravel) structures, were also associated to the higher values of richness. The high richness in the study area as a whole seemed to be a direct consequence of its environmental heterogeneity, once it was composed by quite distinct habitat types.

scholarly journals Green roof and ground-level invertebrate communities are similar and are driven by building height and landscape context

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Jacinda R Dromgold ◽  
Caragh G Threlfall ◽  
Briony A Norton ◽  
Nicholas S G Williams
Keyword(s):  
Native Species ◽  
Green Space ◽  
Ground Level ◽  
Green Roofs ◽  
Vegetation Types ◽  
Invertebrate Community ◽  
Invertebrate Communities ◽  
Surrounding Environment ◽  
Native Grassland ◽  
Family Level

Abstract Green roofs are increasingly promoted for urban biodiversity conservation, but the value of these novel habitats is uncertain. We aimed to test two hypotheses: (i) green roofs can support comparable invertebrate family and order richness, composition and abundances to ground-level habitats and (ii) green roofs planted with native species from local habitats will support a richer invertebrate community at family and order level than other green roofs. We sampled the invertebrate community on green roofs dominated by native grassland or introduced succulent species in Melbourne, Australia, and compared these to the invertebrate community in ground-level sites close by, and sites with similar vegetation types. The only significant differences between the invertebrate communities sampled on green roofs and ground-level habitats were total abundance and fly family richness, which were higher in ground-level habitats. Second hypothesis was not supported as invertebrate communities on green roofs supporting a local vegetation community and those planted with introduced Sedum and other succulents were not detectably different at family level. The per cent cover of green space surrounding each site was consistently important in predicting the richness and abundance of the invertebrate families we focussed on, while roof height, site age and size were influential for some taxa. Our results suggest that invertebrate communities of green roofs in Melbourne are driven largely by their surrounding environment and consequently the effectiveness of green roofs as invertebrate habitat is highly dependent on location and their horizontal and vertical connection to other habitats.

scholarly journals Drivers of tropical soil invertebrate community composition and richness across tropical secondary forests using DNA metasystematics

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Katie M. McGee ◽  
Teresita M. Porter ◽  
Michael Wright ◽  
Mehrdad Hajibabaei
Keyword(s):  
Land Use ◽  
Community Composition ◽  
Tropical Forests ◽  
Secondary Forest ◽  
Soil Invertebrates ◽  
Primary Forest ◽  
Soil Invertebrate ◽  
Secondary Forests ◽  
Invertebrate Community ◽  
Invertebrate Communities

Abstract Tropical forests are fundamental ecosystems, essential for providing terrestrial primary productivity, global nutrient cycling, and biodiversity. Despite their importance, tropical forests are currently threatened by deforestation and associated activities. Moreover, tropical regions are now mostly represented by secondary forest regrowth, with half of the remaining tropical forests as secondary forest. Soil invertebrates are an important component to the functioning and biodiversity of these soil ecosystems. However, it remains unclear how these past land-use activities and subsequent secondary forest developments have altered the soil invertebrate communities and any potential ecological consequences associated with this. DNA metabarcoding offers an effective approach to rapidly monitor soil invertebrate communities under different land-use practices and within secondary forests. In this study, we used DNA metabarcoding to detect community-based patterns of soil invertebrate composition across a primary forest, a 23-year-old secondary forest, and a 33-year-old secondary forest and the associated soil environmental drivers of the soil invertebrate community structure in the Maquenque National Wildlife Refuge of Costa Rica (MNWR). We also used a species contribution analysis (SIMPER) to determine which soil invertebrate groups may be an indication of these soils reaching a pre-disturbed state such as a primary forest. We found that the soil invertebrate community composition at class, order, family, and ESV level were mostly significantly different across that habitats. We also found that the primary forest had a greater richness of soil invertebrates compared to the 23-year-old and 33-year-old secondary forest. Moreover, a redundancy analysis indicated that soil moisture influenced soil invertebrate community structure and explained up to 22% of the total variation observed in the community composition across the habitats; whereas soil invertebrate richness was structured by soil microbial biomass carbon (C) (Cmic) and explained up to 52% of the invertebrate richness across the primary and secondary forests. Lastly, the SIMPER analysis revealed that Naididae, Entomobryidae, and Elateridae could be important indicators of soil and forest recuperation in the MNWR. This study adds to the increasing evidence that soil invertebrates are intimately linked with the soil microbial biomass carbon (Cmic) and that even after 33 years of natural regrowth of a forest, these land use activities can still have persisting effects on the overall composition and richness of the soil invertebrate communities.

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