کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
5744526 1618383 2017 8 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
The effects of manipulating microhabitat size and variability on tropical seawall biodiversity: field and flume experiments
ترجمه فارسی عنوان
اثرات دستکاری اندازه میکروبیتیات و تغییرپذیری در تنوع زیستی طوفان استوایی: آزمایشات میدانی و فلوم
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موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
چکیده انگلیسی

Previous studies have shown that concrete tiles on seawalls that incorporate microhabitat size variability (i.e. complexity) can increase species richness compared to unmodified seawalls. In a recent study, we showed that manipulating complexity at the 4-28 mm scale can have an effect on seawall community composition and that the type of structural component (microhabitats such as pits and grooves) can influence assemblage diversity independently of their complexity. It is not known, however, whether these effects will be exhibited at a larger scale; in other words, will the positive relationship be present if the size range of components on concrete tiles is enlarged (8-56 mm). Therefore, in the present study, we examine: (1) the effects of changing the scale of structural manipulation on species richness and, (2) the hydrodynamic properties (i.e. velocity of flow over the whole tile) of different designs. We doubled the size of all x, y and z dimensions to create 400 × 400 × 64 mm concrete tiles (up from 200 × 200 × 32 mm in the previous study) with two different basic designs: 'Pits' and 'Grooves'. These were deployed for one year at two island sites off Singapore's mainland along with 'Granite control' tiles so that we could assess what the existing seawall would host within the same timeframe. Results showed that the 'complex' tiles supported greater richness (S) than 'simple' ones, suggesting that the size range tested here (8-56 mm) is relevant to tropical intertidal communities. Flume experiments revealed similar wave amplitude values over the surfaces of all tile types, including the granite controls, suggesting that intertidal organisms are unlikely to colonise the tiles differentially as a result of cm-scale hydrodynamic differences, i.e. the dominant mechanism underlying this 'complexity-diversity' relationship is unlikely to be due to differences in flow velocities over a 400 × 400 mm tile surface but, rather, is related to resource (e.g. refuge) availability. These results help identify the “scale of effect” of topographic complexity which can be directly integrated into ecological engineering designs to increase biodiversity on tropical seawalls.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Experimental Marine Biology and Ecology - Volume 492, July 2017, Pages 113-120
نویسندگان
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