Evaluating the Relative Effectiveness of Sampling Methods for Reef Meiofauna Community Structure Studies

2012 ◽  
Vol 88 (4) ◽  
pp. 1003-1018
Author(s):  
Karla Priscila Barros da Silva ◽  
Rafael Carnaúba Ferreira ◽  
Taciana Kramer Pinto
Keyword(s):  
Community Structure ◽  
Sampling Methods ◽  
Relative Effectiveness ◽  
Meiofauna Community

scholarly journals Change in the meiofauna community structure of sandy beaches of the Nuevo Gulf (Chubut, Argentina)

2012 ◽  
Vol 52 (34) ◽  
pp. 411-422 ◽  
Author(s):  
Carlos A. Harguinteguy ◽  
M. Noelia Cofré ◽  
Catalina T. Pastor de Ward
Keyword(s):  
Community Structure ◽  
Environmental Gradients ◽  
Sandy Beaches ◽  
Core Tube ◽  
Meiofauna Community ◽  
Diameter Core ◽  
Abiotic Variables ◽  
Abundance And Diversity ◽  
One Way Anova ◽  
Main Factor

The composition and distribution of the benthic meiofauna assemblages of the Nuevo Gulf (Chubut, Argentina) are described in relation to abiotic variables. The meiofauna and sediment samples were collected in the intertidal zone of four sandy beaches with different anthropic disturbances in June 2005. The samples were obtained at 20 sampling sites using a 2.5 cm diameter core tube at a depth of 10 cm. A total of 13 meiofauna taxa were identified, with the meiofauna being primarily represented by nematodes, gastrotrichs, ciliates and polychaetes and the meiofauna abundances ranging from 1.5 × 10³ to 6.5 × 10³ ind. 10 cm‑2. Univariate (one-way ANOVA test) and multivariate (ANOSIM/MDS test) analyses showed clear dissimilarities in community structures between sites with anthropic effects and those in pristine condition, revealed by the significant differences were found between beaches near to and far way from a city with port activity. The meiofaunal assemblage varied in abundance and diversity, and these changes in the community structure may have been related to environmental gradients on the shore. The BIO‑ENV analysis showed that the redox potential discontinuity depth might be the main factor in the spatial distribution of organisms.

scholarly journals How do food sources drive meiofauna community structure in soft-bottom coastal food webs?

2018 ◽  
Vol 165 (10) ◽  
Author(s):  
L. H. van der Heijden ◽  
J. Rzeznik-Orignac ◽  
R. M. Asmus ◽  
D. Fichet ◽  
M. Bréret ◽  
...  
Keyword(s):  
Community Structure ◽  
Food Webs ◽  
Food Sources ◽  
Soft Bottom ◽  
Meiofauna Community

Is meiofauna community structure in Artificial Substrate Units a good tool to assess anthropogenic impact in estuaries?

2016 ◽  
Vol 110 (1) ◽  
pp. 354-361 ◽  
Author(s):  
Ana Bolena Harten Pinto Costa ◽  
Ana Paula Maria Cavalcanti Valença ◽  
Paulo Jorge Parreira dos Santos
Keyword(s):  
Community Structure ◽  
Anthropogenic Impact ◽  
Artificial Substrate ◽  
Good Tool ◽  
Meiofauna Community

scholarly journals Effects of the burrowing crab Chasmagnathus granulata (Dana) on meiofauna of estuarine intertidal habitats of Patos Lagoon, Southern Brazil

2005 ◽  
Vol 48 (2) ◽  
pp. 267-274 ◽  
Author(s):  
Leonardo Cruz Rosa ◽  
Carlos Emilio Bemvenuti
Keyword(s):  
Community Structure ◽  
Salt Marsh ◽  
Southern Brazil ◽  
Patos Lagoon ◽  
Chasmagnathus Granulata ◽  
Meiofauna Community ◽  
Intertidal Habitats ◽  
Crab Chasmagnathus Granulata ◽  
Burrowing Crab

This study aimed to evaluate the effects of the burrowing crab Chasmagnathus granulata on meiofauna at three intertidal habitats across a tidal exposure gradient (i.e., an emerged salt marsh, an emerged mudflat and a submerged mudflat) in an estuarine embayment of Patos Lagoon, Southern Brazil. Meiofauna community was dominated by nematodes and ostracods, following by copepods and turbellarians. Densities of all studied organisms varied significantly among habitats. Highest values were observed in submerged mudflat while lower in salt marsh. Nematodes were unaffected by crab in either habitat, whereas ostracod, copepod and turbellarian densities were significantly lower in disturbed than control areas in both mudflat habitats. Any meiofaunal group was affected in salt marsh, probably due to a less intense disturbance. The results showed that the burrowing crab C. granulata could play an important role on meiofauna community structure in estuarine intertidal habitats of Patos Lagoon, because crab disturbance seemed to affect mainly surface populations, especially in mudflat. However, the meiofauna response to crab disturbance was variable among habitats depending of the intensity and the frequency of the disturbance.

Evaluating the efficiency of different sampling methods to survey social wasps (Vespidae: Polistinae) in an anthropized environment

Sociobiology ◽  
2018 ◽  
Vol 65 (3) ◽  
pp. 515 ◽  
Author(s):  
Gabriel Castro Jacques ◽  
Epifânio Pires ◽  
Marcel Gustavo Hermes ◽  
Lucas Del Bianco Faria ◽  
Marcos Magalhães Souza ◽  
...  
Keyword(s):  
Biological Control ◽  
Community Structure ◽  
Sampling Methods ◽  
Social Wasp ◽  
Social Wasps ◽  
Active Search ◽  
The Social ◽  
Area Sampling ◽  
Flower Visiting ◽  
Species Being

Social wasps play important ecological roles, such as the natural biological control of other arthropods as well as major components of the flower-visiting insect guild. Despite many studies focusing on the survey of these organisms in Brazil, information on the community structure of polistines in anthropized environmets is still rare. The goals of the present study were: i) to survey the social wasp fauna in an anthropized area in the transition of Cerrado and Atlantic Forest; ii) to investigate the efficiency of two sampling methods, namely active search for wasps and the use of attractive traps; iii) to investigate the performance of different attractive baits in the capture success of social wasps in the study area. Sampling of social wasps was conducted by actively searching for individuals and by using attractive traps. A total of 40 species was recorded, with Agelaia multipicta and Agelaia vicina species being the most frequently collected with attractive traps and Mischocyttarus cassununga by actively searching for wasps. In all analyses performed (except when comparing abundance of social wasps considering the molasses bait and the active search), actively searching for wasps was the best method. This is also highlighted by the fact that the time spent actively capturing polistines was considerably lower than the time (and costs) that the traps were left in the field. Active search, as demonstrated by previous studies, remains as the best capturing methodology when surveying Neotropical social wasps, either in natural or anthropized environments.

scholarly journals Community Structure of Gastropod in Seagrass on Intertidal Area in The Tongkeina Village of Manado City

2013 ◽  
Vol 1 (3) ◽  
pp. 102
Author(s):  
Gladys L Saripantung ◽  
Jan FWS Tamanampo ◽  
Gaspar Manu
Keyword(s):  
Community Structure ◽  
Population Density ◽  
Relative Density ◽  
Sampling Methods ◽  
Diversity Index ◽  
Intertidal Area ◽  
Gastropod Species ◽  
Relative Population ◽  
Study Sites ◽  
Index Value

ABSTRACT Gastropod community is one of the important components of the food chain in the seagrass beds. The purpose of this study is to identify the types of gastropods and to determine population density, relative population density, species diversity, dominance and species associations of gastropod community at three study sites in Tongkeina, Manado city. The study sites were Bahowo, Batu Meja and Rap-Rap. Data were collected by sampling methods using quadratic transect technique. The study was conducted from November to December 2012. Over all, 20 species of gastropods comprising 7 families in 4 orders were collected. Among all sites, the highest density of 35,64 individuals/m2 was found in Bahowo site and the lowest density of 14,84 individuals/m2 was found in Rap-Rap site. The highest relative density was found at Batu Meja site, shown by Columbella versicolor species with relative density of 55.9%. Diversity index ranged from 1,4786 (Batu Meja) – 1,9382 (Rap-Rap). Batu Meja site shown an index value of C = 0,35 which indicating that there is dominance by 2 species, i.e.Columbella vesicolor and Columbella rusticoides, in that site.Associations between gastropod species at all three locations formed either positive or zero association, whereas negative associations between gastropod populations were not found. Keywords : community structure, gastropods, seagrass, Tongkeina, Manado  ABSTRAK Komunitas gastropoda merupakan salah satu komponen penting dalam rantai makanan di padang lamun.  Tujuan penelitian ini adalah mengidentifikasi jenis gastropoda dan mengetahui kepadatan populasi, kepadatan relative populasi, keanekaragaman spesies, dominasi dan asosiasi antar spesies gastropoda yang telah dilakukan pada tiga lokasi penelitian di kelurahan Tongkeina kota Manado. Pengambilan data dilakukan dengan metoda sampling yang menggunakan teknik transek kuadrat. Waktu penelitian pada bulan November sampai Desember 2012.  Berdasarkan hasil penelitian, diperoleh 20 spesies gastropoda yang terdiri dari 7 famili dalam 4 ordo. Kepadatan tertinggi dari semua stasiun adalah Stasiun Bahowo yakni 35,64 ind/m2, Stasiun Rap-Rap adalah stasiun yang memiliki kepadatan terendah dari ketiga stasiun penelitian yakni 14,84 ind/m2. Kepadatan relative tertinggi terdapat di Stasiun 1 (Batu Meja) yaitu pada spesies Columbella versicolor dengan kepadatan relatif  55,9 %. Indeks keanekaragaman berkisar 1,4786 (Batu Meja)–1,9382 (Rap-Rap). Stasiun Batu Meja dengan nilai indeks C=0,35 menunjukan 2 spesies yang mendominasi yakni Columbella vesicolor dan Columbella rusticoides. Asosiasi antara spesies gastropoda di ketiga lokasi membentuk asosiasi positif dan asosiasi nol, sedangkan asosiasi negative antara populasi gastropoda tidak ditemukan. Kata kunci : struktur komunitas, gastropoda, lamun, Tongkeina, Manado

scholarly journals Response of estuarine meiofauna assemblage to effects of fertilizer enrichment used in the sugar cane monoculture. Pernambuco, Brazil

2009 ◽  
Vol 57 (1) ◽  
pp. 43-55 ◽  
Author(s):  
Paulo J. P. Santos ◽  
Mônica L. Botter-Carvalho ◽  
Ananias B. do Nascimento-Júnior ◽  
Raquel G. C. Marinho ◽  
Paulo V. V. C. Carvalho ◽  
...  
Keyword(s):  
Community Structure ◽  
Sugar Cane ◽  
Low Dose ◽  
Environmental Parameters ◽  
Experimental Period ◽  
High Dose ◽  
Meiofauna Community ◽  
Taxonomic Groups ◽  
Nitrogen Phosphorus

In situ application of inorganic fertilizer was used to simulate environmental eutrophication associated with the sugar cane monoculture. Meiofauna community structure is herein used to assess this experimental impact. Nine quadrangular areas (4m² each) were randomly defined in the midlittoral estuarine area. Three of these areas received a high dose of sugar cane fertilizer (375 g/m² Nitrogen-Phosphorus-Potassium), three areas received a low dose of the fertilizer (187.5 g/m²) and the other three areas represented the control. The fertilizer was applied every week. Environmental parameters and meiofauna were sampled using three-to-four week intervals. Six samplings were subsequently performed maintaining this interval. Meiofauna was counted and identified to major taxonomic groups. Meiofauna community structure varied throughout the experimental areas. Control areas maintained their abundance values during the study period, but within the enriched areas meiofauna abundance decreased greatly. MDS and ANOSIM analysis showed significant variation in the meiofauna community structure among experimental areas and also along the experimental period in the enriched areas.

Diversity and distribution of groundwater fauna in a calcrete aquifer: does sampling method influence the story?

2008 ◽  
Vol 22 (2) ◽  
pp. 127 ◽  
Author(s):  
Adam Allford ◽  
Steven J. B. Cooper ◽  
William F. Humphreys ◽  
Andrew D. Austin
Keyword(s):  
Population Dynamics ◽  
Species Richness ◽  
Community Structure ◽  
Sampling Methods ◽  
Sampling Bias ◽  
Spatial And Temporal Patterns ◽  
Discrete Interval ◽  
Current Sampling ◽  
Species Richness And Abundance ◽  
Western Australian

There has been an increase in the number of studies examining the spatial and temporal patterns in species richness, community structure and population dynamics of groundwater organisms. These studies have raised the issue of uncertainty about the comparability of different sampling methods, and questions of whether sampling bias may exist. Recently, a diverse subterranean fauna was discovered in calcrete (carbonate) aquifers of the Yilgarn Region of central Western Australia. Little is known about the community structure and population dynamics in these aquifers. One important issue is whether current sampling methods adequately sample the species richness and abundance of the fauna to allow for comparative studies. Here we investigate the effectiveness of three sampling methods: haul net sampling, pumping with a 12-V impeller pump, and a discrete interval sampler. The methods were trialled over 16 months with >250 samples taken from 55 uncased bore holes. No significant taxonomic bias was detected across the sampling methods. However, sampling using a haul net was found to be the most efficient method for capturing the available taxa per unit time when sampling bores are less than 10 m deep, with pumping being the least efficient. These results are discussed in relation to the problems of studying stygofauna in Western Australian calcrete aquifers, and of groundwater faunas more generally.

Effects of green macroalgal blooms on the meiofauna community structure in the Bay of Cádiz

2013 ◽  
Vol 70 (1-2) ◽  
pp. 10-17 ◽  
Author(s):  
J. Bohórquez ◽  
S. Papaspyrou ◽  
M. Yúfera ◽  
S.A. van Bergeijk ◽  
E. García-Robledo ◽  
...  
Keyword(s):  
Community Structure ◽  
Macroalgal Blooms ◽  
Meiofauna Community ◽  
Bay Of Cadiz ◽  
Bay Of Cádiz

scholarly journals The relative effectiveness of cross friction and Mill's manipulation as compared to cross friction alone in the treatment of lateral epicondylitis (tennis elbow)

2000 ◽  
Author(s):  
◽  
Junaid Shaik
Keyword(s):  
General Population ◽  
Sampling Methods ◽  
Tennis Elbow ◽  
Relative Effectiveness ◽  
Lateral Epicondylitis ◽  
Controlled Study ◽  
Group 2 ◽  
Prospective Controlled Study ◽  
Group 1

The purpose of this study was to determine the relative effectiveness of cross friction combined with Mill's manipulation compared to cross friction alone in the treatment of lateral epicondylitis. This was a prospective, controlled study. The study involved thirty subjects, fifteen randomly allocated into two groups. These patients were selected from the general population by purposive sampling methods. Group 1 received cross friction and Mill's manipulation while Group 2 received cross friction only. Each subject was treated 6 times over a three-week period. Patients were required to return for a one-month follow-up from the date of their last consultation.

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