| 熊李虎,陆健健.2009.长江河口湿地不同植被中无齿螳臂相手蟹的分布及其洞穴利用.动物学杂志,44(6):1-9. |
| 长江河口湿地不同植被中无齿螳臂相手蟹的分布及其洞穴利用 |
| Distribution and Use of Burrows by Chiromantes dehaani in Different Vegetations in Salt Marsh of Yangtze Estuary |
| 投稿时间：2009-04-27 修订日期：2009-07-13 |
| DOI： |
| 中文关键词: 无齿螳臂相手蟹 植被 分布 庇护所 盐沼 洞穴 |
| 英文关键词:Chiromantes dehaani Vegetation Distribution Refugia Salt marsh Burrow |
| 基金项目:上海市科委科技攻关项目(No.06DZ12301) |
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| 中文摘要: |
| 无齿螳臂相手蟹(Chiromantes dehaani)是长江河口中、高潮滩的优势底栖动物之一,具有重要的生态功能。由于其经济价值较低,所受关注很少。本文调查了相似高程芦苇(Phragmites australis)带、芦苇斑块、菰(Zizania aquatica)植被以及裸地4种生境中无齿螳臂相手蟹的数量分布及其洞穴的利用情况。有植被分布的3种生境间植株密度、植株高度和植物干重生物量(地上部分)差异显著(P<0.001);4种生境间,陷阱桶采样获取的无齿螳臂相手蟹数量分布(P<0.001)和性比(P=0.001)差异显著;裸地区域没有无齿螳臂相手蟹可用的洞穴分布,芦苇带、芦苇斑块和菰植被间无齿螳臂相手蟹可用的洞穴密度(P<0.019)、单位洞穴蟹个体数(P<0.001)差异显著,挖掘洞穴采样获取的无齿螳臂相手蟹密度差异接近显著水平(P=0.067),洞穴占用率(P=0.667)、不同洞穴占用方式频次组成(P>0.05)差异不显著;无齿螳臂相手蟹可利用洞穴密度与植株密度、植物干重生物量显著负相关(P<0.05),而挖掘洞穴采样获取的无齿螳臂相手蟹密度与植株高度(P=0.077)相关性接近显著水平且与洞穴密度(P<0.001)显著正相关。这些结果表明盐沼植被对无齿螳臂相手蟹的分布和洞穴利用存在影响。而进一步探讨盐沼不同植被对无齿螳臂相手蟹分布的影响,需要先了解无齿螳臂相手蟹在不同植被中分布格局在时间上的变化,并结合无齿螳臂相手蟹在不同植被间的迁移行为以及繁殖周期等进行探讨。 |
| 英文摘要: |
| Chiromantes dehaani is one of the dominant burrowing macro-benthos in salt marsh of Yangtze Estuary. With the burrowing behaviors,they play important roles in many ecosystem processes. Though their distribution is associated with salt marsh vegetation,the effects of different kind of salt marsh vegetations on the distributions of C.dehaani and their burrows are poorly exploited. In the present study,the distributions of C.dehaani and their burrows and the occupancy status of their burrows were investigated in four habitat types,reed bed (dominated by Phragmites australis),patches of P.australis,large area of Zizania aquatica and non-vegetated area with the same altitude at the Yangtze Estuary. There were significant differences among habitats in shoot density,height and dry-biomass (P<0.001). There were significant differences among habitats in abundance (P<0.001) and sex ratio (P=0.001) for C.dehaani estimated by traps. No burrows were available for C.dehaani in non-vegetated area. Among reed bed,patches of reeds and wild rice vegetation,there were significant differences between them in density of burrows (P<0.019) and number of individuals of C.dehaani sharing one burrow (P<0.001). Marginal significant difference in density of C.dehaani estimated by excavating method (P=0.067) was found,while the percent of occupied burrows (P=0.667) and the frequency distribution of different occupancy types (P>0.05) were not significant different. There were significant negative correlations between burrow density and shoot density and dry biomass (P<0.05). A significant correlation (P<0.001) between crab density and burrow density,and a marginal significant correlation (P=0.077) between crab density and shoot height was confirmed. These results indicate that the salt marsh vegetations have influences on distribution of C.dehanni and on their behaviors. Further studies focused on the relationships between salt marsh vegetations and distributions of C.dehaani should be conducted on the temporal variation of distribution pattern of C.dehaani in different salt marsh vegetations with consideration of migration behaviors and breeding cycles of C.dehaani. |
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