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Alpheus edamensis: the gardeners of the Indonesian Archipelago

Linden, B. (2005) Alpheus edamensis: the gardeners of the Indonesian Archipelago. Master's Thesis / Essay, Biology.

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Abstract

The harvesting behaviour of Aipheus edamensis, In the seagrass beds in the Indonesian Archipelago has been Investigated to gain a greater understanding of the persistence of seagrass beds, nutrient sinks/sources, in a nutrient poor environment. The harvesting of the daily produced biomass of Thalassia hemprichii was based on the pilot of Stapel and Erftemeijer (2000). In total 75 observations of 15 minutes each were made, 25x25cm quadrants of seagrass, 50x50 cm quadrants of loose leaves were collected and water samples were taken from interstitial sediment pore water as well as the water column. During this time we looked at sediment reworking and harvesting. The nutrient concentrations, Nitrogen and Carbon, of T. hemprichii were measured at the Radboud University In Nijmegen, the Netherlands. Water concentrations were measured with the help of Hasanuddin University (UNHAS) in Makassar,Indonesia. The gathered information resulted in an estimated 17.2% of the daIly production of T. hemprichil being harvested by the A. edamensis. The pilot experiment estimated that 53% of the daily produced seagrass was harvested. We suggest that this difference is mainly caused because of the different season conditions. An unusually large storm hit Makassar around mid December, whIch was half through the experiment. This made It impossible to conduct research there for 10 days, while the storm passed. A large amount of sediment was deposited on the seagrass bed. This in turn buried much of the T. hemprichil. More than 40% of the normally aboveground produced leaf was under the surface and therefore unavailable for harvest by A. edamensis. This situation was temporary and unique.

Item Type: Thesis (Master's Thesis / Essay)
Degree programme: Biology
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 07:31
Last Modified: 15 Feb 2018 07:31
URI: http://fse.studenttheses.ub.rug.nl/id/eprint/9129

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