Abundance of Echinothrix diadema and its substrate coverage in the Mombasa Marine National Park and Reserve (Kenya) in September-October 1997

Tessa Van Hout; Marie Hermande Daro; Marie Hermande Daro; Nyawira Muthiga; Yves Samyn

doi:10.14284/89

Abundance of Echinothrix diadema and its substrate coverage in the Mombasa Marine National Park and Reserve (Kenya) in September-October 1997

Citation

Van Hout T.; Daro N.; Laboratorium voor Ecologie en Systematiek; Vakgroep Biologie; Faculteit Wetenschappen. Vrije Universiteit Brussel: Belgium; (2016): Abundance of Echinothrix diadema and its substrate coverage in the Mombasa Marine National Park and Reserve (Kenya) in September-October 1997. (http://www.vliz.be/en/imis?module=dataset&dasid=4511) https://dx.doi.org/10.14284/89 accessed via GBIF.org on 2024-12-12.

Description

Absolute abundance of Echinothrix diadema in the Mombasa Marine National Park and Reserve in September-October 1997, together with percentages of substrate cover (seagrasses, algae, corals, sediment) at the different sampling locations. The data were digitized by VLIZ from the original report: Van Hout, T. (1998). Patterns of distribution of Echinothrix diadema (Echinodermata: Echinoidea) in the Mombasa Marine National Park and Reserve, Kenya. MSc Thesis. Vrije Universiteit Brussel: Brussel. 71 pp.

Additional info

The field studies were carried out in the inner reef lagoon of the Mombasa Marine National Park (MMNP) and the adjacent Mombasa Marine National Reserve (MMNR). Also the outer reef (only at the park’s side) was investigated for the presence of E. Diadema. During one month (29/9/97-24/10/97), surveys were made at low tide when the water reached a depth maximum 6 m, in the deep channel. Both locations (park and reserve) were subdivided in four different zones along the reef. A minimum of eight circle samples was laid in each zone, with a one-minute swimming distance (approximately 30 m) between them, using mask, snorkel and fins. Circle samples covering an area of 12.6 m^2 were laid. This was done by means of a 2-m line attached to a weight, which functioned respectively as radius and center of the circle. First the depth at the center of each circle sample was measured with a measuring tape and the time of each depth measurement was recorded on a plastic board, like all measurements. Within the circle samples the number of urchins of the species Echinothrix diadema were counted and the substrate cover was estimated. The topographic complexity of the reef was estimated using the rugosity measurement method (McClanahan T.R. & Shafir 1990).

Taxonomic Coverages

urn:lsid:marinespecies.org:taxname:123082

Echinoidea
rank: class

urn:lsid:marinespecies.org:taxname:213378

Echinothrix diadema
rank: species

Geographic Coverages

EurOBIS calculated BBOX > station Bounding Box

Mombasa Marine National Park and Reserve

Bibliographic Citations

Contacts

Tessa Van Hout
originator
Vrije Universiteit Brussel; Faculteit Wetenschappen; Vakgroep Biologie; Laboratorium voor Ecologie en Systematiek

Marie Hermande Daro
originator
Vrije Universiteit Brussel; Faculteit Wetenschappen; Vakgroep Biologie; Laboratorium voor Ecologie en Systematiek

Nyawira Muthiga
originator
Kenya Wildlife Service

Yves Samyn
originator
Vrije Universiteit Brussel; Faculteit Wetenschappen; Vakgroep Biologie; Laboratorium voor Ecologie en Systematiek
userId: https://orcid.org/0000-0002-1653-3018

originator
Vrije Universiteit Brussel; Faculteit Wetenschappen; Vakgroep Biologie; Laboratorium voor Ecologie en Systematiek

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