Meiobenthos of 5 mangrove vegetation types at Gazi Bay (Kenya) in August 1989

Sandra Vanhove; Magda Vincx; August Coomans; August Coomans

doi:10.14284/144

Meiobenthos of 5 mangrove vegetation types at Gazi Bay (Kenya) in August 1989

Citation

Vanhove S.; Coomans A.; Vakgroep Biologie; Faculteit Wetenschappen. Ugent: Belgium; (2016): Meiobenthos of 5 mangrove vegetation types at Gazi Bay (Kenya) in August 1989. (http://www.vliz.be/en/imis?module=dataset&dasid=5180) https://dx.doi.org/10.14284/144 accessed via GBIF.org on 2024-12-15.

Description

Vertical distribution data of meiobenthos at Avicennia, Bruguiera, Ceriops, Rhizophora and Sonneratia and abiotic factors of the sediment sampled on the 7th of August 1989 in Gazi Bay (Kenya). The data were digitized by VLIZ from the original report: Vanhove, S. (1990). Studie van de benthische meiofauna van vijf mangrove-vegetatietypes van Gazi Bay (Kenia)= Study of the meiobenthos of 5 mangrove vegetation types in Gazi Bay, Kenya. MSc Thesis. University of Gent: Faculty of Sciences: Gent. IX, 146, deel 2 tabellen en figuren pp.

Additional info

Vertical distribution patterns of meiobenthos and their relation to the different mangrove vegetations Avicennia, Bruguiera, Ceriops, Rhizophora and Sonneratia have been examined. The vertical distribution pattern in the sediment (to a depth of 20 cm) of density and biomass of the meiofauna, and abiotic factors such as sediment granulometry, nutrients, organic matter were used to explain the observed distribution patterns. A total of 17 taxa has been observed and high densities were encountered: Bruguiera (6707 ind/10 cm2 ), followed by Rhizophora (3998 ind/10cm2 ), Avicennia (3442 ind/10cm2 ), Sonneratia (2889 ind/10cm2 ) and Ceriops (1976 ind/10cm2 ). Nematodes dominated; the remainder was made of copepods, tubellarians, oligochaetes, polychaetes and rotifers. Other taxa were only sporadically observed, partially governed by the sediment. The data indicate high densities still occur at greater depth: 54 ind. At Avicennia 15-20 cm; 759 ind. At Bruguiera 10-15 cm; 380 ind. At Ceriops 15-22.5 cm; 37 ind. At Rhizophora 15-17 cm and 13 ind. At Sonneratia +15 cm. Particle size measurements performed for the five stations show medium sand. The mud levels reached often considerable amounts (up to 8%). Both Kjeldahl-N and total organic matter are generally more concentrated with depth. The nutrient concentrations in the depth intervals, as well as the compared sediments, show great variability. Nematode length increases with increasing depth, although important differences between the stations were observed. Length and density are invertedly related. The data of total biomass differ considerable from one station to another: Ceriops (9.10 -5g) and Sonneratia (19.10 -5g). Besides granulometry, oxygen is the most important factor influencing composition and distribution of the meiofauna.

Taxonomic Coverages

urn:lsid:marinespecies.org:taxname:1135

Amphipoda
rank: order

urn:lsid:marinespecies.org:taxname:235040

Avicennia marina
rank: species

urn:lsid:marinespecies.org:taxname:235082

Bruguiera gymnorrhiza
rank: species

urn:lsid:marinespecies.org:taxname:1100

Calanoida
rank: order

urn:lsid:marinespecies.org:taxname:235088

Ceriops tagal
rank: species

urn:lsid:marinespecies.org:taxname:155670

Cladocera
rank: superorder

urn:lsid:marinespecies.org:taxname:118086

Collembola
rank: subclass

urn:lsid:marinespecies.org:taxname:1080

Copepoda
rank: class

urn:lsid:marinespecies.org:taxname:101

Gastropoda
rank: class

urn:lsid:marinespecies.org:taxname:2078

Gastrotricha
rank: phylum

urn:lsid:marinespecies.org:taxname:292685

Halacaroidea
rank: superfamily

urn:lsid:marinespecies.org:taxname:1307

Insecta
rank: subclass

urn:lsid:marinespecies.org:taxname:1131

Isopoda
rank: order

urn:lsid:marinespecies.org:taxname:101060

Kinorhyncha
rank: phylum

urn:lsid:marinespecies.org:taxname:799

Nematoda
rank: phylum

urn:lsid:marinespecies.org:taxname:2036

Oligochaeta
rank: subclass

urn:lsid:marinespecies.org:taxname:1078

Ostracoda
rank: class

urn:lsid:marinespecies.org:taxname:883

Polychaeta
rank: class

urn:lsid:marinespecies.org:taxname:235095

Rhizophora mucronata
rank: species

urn:lsid:marinespecies.org:taxname:14260

Rotifera
rank: phylum

urn:lsid:marinespecies.org:taxname:235107

Sonneratia alba
rank: species

urn:lsid:marinespecies.org:taxname:1276

Tardigrada
rank: phylum

urn:lsid:marinespecies.org:taxname:794

Turbellaria
rank: class

Geographic Coverages

EurOBIS calculated BBOX > station Bounding Box

ISW, Kenya, Gazi Bay

Bibliographic Citations

Contacts

Sandra Vanhove
originator
Universiteit Gent; Faculteit Wetenschappen; Vakgroep Biologie

Magda Vincx
originator
Universiteit Gent; Faculteit Wetenschappen; Vakgroep Biologie; Onderzoeksgroep Mariene Biologie
BE
email: magda.vincx@ugent.be

August Coomans
originator
Universiteit Gent; Faculteit Wetenschappen; Vakgroep Biologie

originator
Universiteit Gent; Faculteit Wetenschappen; Vakgroep Biologie

metadata author
Kenya Marine and Fisheries Research Institute Mombasa Centre

custodian steward
Vlaams Instituut voor de Zee
BE
email: info@vliz.be

metadata author
Kenya Marine and Fisheries Research Institute

administrative point of contact
Vlaams Instituut voor de Zee
BE
email: info@vliz.be