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Abundance of Echinothrix diadema and its substrate coverage in the Mombasa Marine National Park and Reserve (Kenya) in September-October 1997
Citeerbaar als data publicatie
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. https://doi.org/10.14284/89
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Beschikbaarheid: Creative Commons License Deze dataset valt onder een Creative Commons Naamsvermelding 4.0 Internationaal-licentie.

Beschrijving
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. meer

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).

Scope
Thema's:
Biologie > Benthos, Biologie > Invertebraten
Kernwoorden:
Marien/Kust, Coverage, human, Sea urchins, Substraten, EurOBIS calculated BBOX, Kenia, Echinoidea, Echinothrix diadema (Linnaeus, 1758)

Geografische spreiding
EurOBIS calculated BBOX Stations
Bounding Box
Coördinaten: MinLong: 39,72; MinLat: -4,0473 - MaxLong: 39,7593; MaxLat: -3,9712 [WGS84]

Spreiding in de tijd
30 September 1997 - 23 Oktober 1997

Taxonomic coverage
Echinoidea [WoRMS]
Echinothrix diadema (Linnaeus, 1758) [WoRMS]

Parameters
% Bedekking
% bedekking door macroalgen
% zeegras bedekking
Aantallen (geteld)
Diepte

Bijdrage door
Vlaams Instituut voor de Zee (VLIZ), meerdata beheerder
Vrije Universiteit Brussel; Faculteit Wetenschappen; Vakgroep Biologie; Laboratorium voor Ecologie en Systematiek (ECOL), meerdata creatordata creator
Kenya Wildlife Service (KWS), meerdata creator

Gerelateerde datasets
Maakt deel uit van:
Historical Kenyan-Belgian research datasets (1873-1999), meer
Gepubliceerd in:
EurOBIS: European Ocean Biodiversity Information System, meer

Publicatie
Gebaseerd op deze dataset
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., meer

Dataset status: Afgelopen
Data type: Data
Data oorsprong: Onderzoek: veldonderzoek
Metadatarecord aangemaakt: 2013-11-19
Informatie laatst gewijzigd: 2022-08-03
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