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首页> 外文期刊>Continental Shelf Research: A Companion Journal to Deep-Sea Research and Progress in Oceanography >Spatial patterns of sub-tidal seagrasses and their tissue nutrients in the Torres Strait, northern Australia: Implications for management
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Spatial patterns of sub-tidal seagrasses and their tissue nutrients in the Torres Strait, northern Australia: Implications for management

机译：澳大利亚北部托雷斯海峡潮下海草的空间格局及其组织营养素：对管理的意义

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The distribution and nutritional profiles of sub-tidal seagrasses from the Torres Strait were surveyed and mapped across an area of 31,000 km(2). Benthic sediment composition, water depth, seagrass species type and nutrients were sampled at 168 points selected in a stratified representative pattern. Eleven species of seagrass were present at 56 (33.3%) of the sample points. Halophila spinulosa, Halophila ovalis, Cymodocea serrulata and Syringodium isoetifolium were the most common species and these were nutrient profiled. Sub-tidal seagrass distribution (and associated seagrass nutrient concentrations) was generally confined to northern-central and south-western regions of the survey area (< longitude 142.60), where mean water depth was relatively shallow (approximately 13 m below MSL) and where sediments were comprised primarily muddy sand to gravelly sand. Seagrass nitrogen and starch content, the most important nutrients for marine herbivores, were significantly correlated with species and with the plant component (above or below ground). For all seagrass species, the above-ground component (shoots and leaves) possessed greater nitrogen concentrations than the below-ground component (roots and rhizomes), which possessed greater starch concentrations. S. isoetifolium had the highest total nitrogen concentrations (1.40 +/- 0.05% DW). However, it also had higher fibre concentrations (38.2 +/- 0.68% DW) relative to the other four species. H. ovalis possessed the highest starch concentrations (2.76 +/- 0.12% DW) and highest digestibility (83.24 +/- 0.66% DW) as well as the lowest fibre (27.2 +/- 0.66% DW). The high relative abundance (found at 55% of the sites that had seagrass) and nutrient quality characteristics of H. ovalis make it an important source of energy to marine herbivores that forage sub-tidally in the Torres Strait. There were two regions in Torres Strait (north-central and south-western) where sub-tidal seagrass meadows were prevalent and of relatively higher nutritional value. This spatial and nutritional information can be used by local agencies to manage and to protect the ecological, economic and cultural values of the sub-tidal seagrass ecosystems and associated fisheries of the Torres Strait. Crown Copyright (c) 2008 Published by Elsevier Ltd. All rights reserved.
机译：对托雷斯海峡海域潮下海草的分布和营养状况进行了调查，并绘制了31,000 km（2）的面积图。在以分层代表模式选择的168个点对底栖沉积物组成，水深，海草种类类型和养分进行了采样。在样本点的56个（33.3％）处存在11种海草。嗜盐梭菌，卵形嗜盐菌，锯齿Cymodocea serrulata和Syringodium isoetifolium是最常见的物种，并对它们进行了营养分析。潮下海草分布（及相关的海草养分浓度）通常局限于调查区域的中北部和西南部地区（<经度142.60），那里的平均水深相对较浅（大约低于MSL 13 m），并且沉积物主要由泥沙到砾石沙组成。海草氮和淀粉含量是海洋草食动物最重要的养分，与物种和植物成分（地上或地下）显着相关。对于所有海草种类，地上成分（枝和叶）的氮含量高于地上成分（根和根茎）的淀粉含量，而地上成分（根茎和根茎）的氮含量更高。异链球菌的总氮浓度最高（1.40 +/- 0.05％DW）。但是，相对于其他四个种类，它的纤维浓度也更高（38.2 +/- 0.68％DW）。卵形嗜血杆菌具有最高的淀粉浓度（2.76 +/- 0.12％DW）和最高的消化率（83.24 +/- 0.66％DW）以及最低的纤维（27.2 +/- 0.66％DW）。椭圆形H.的相对丰富度很高（发现在有海草的地点的55％处）和营养品质特征，使其成为在Torres Strait大量觅食的海洋草食动物的重要能源。托雷斯海峡有两个地区（中北部和西南部），潮下海草草甸盛行且营养价值较高。地方机构可以利用这种空间和营养信息来管理和保护托雷斯海峡潮下海草生态系统和相关渔业的生态，经济和文化价值。 Crown版权所有（c）2008，由Elsevier Ltd.发行。保留所有权利。

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