The effects of non-native signal crayfish (Pacifastacus leniusculus) on fine sediment and sediment-biomonitoring.
The effects of non-native signal crayfish (Pacifastacus leniusculus) on fine sediment and sediment-biomonitoring.
复制标题
非本地信号小龙虾（Pacifastacus leniusculus）对细小沉积物和沉积物生物监测的影响。
DOI：
10.1016/j.scitotenv.2017.05.106
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Turley MD
中科院分区：
文献类型：
--
作者：
Turley MD
北美的信号小龙虾（学名：Acrofastacus leniusculus）已经入侵了整个欧洲的淡水生态系统。最近的研究表明，信号小龙虾对大型无脊椎动物的捕食可能会影响用于评估生态退化原因的淡水生物监测工具的性能。鉴于全球对生物监测的依赖，更好地了解入侵物种的潜在影响至关重要。小龙虾也是一种生态因子，因此，本研究的目的是调查在小龙虾入侵后，沉积物生物监测工具的输出是否发生了变化，以及这些变化是否反映了入侵后沉积的细颗粒沉积物的变化，或者与细颗粒沉积物无关的大型底栖动物群落组成的变化。利用对长期环境监测数据的间断时间序列分析和分层建模方法。对所有地点（n= 71）的分析显示，在入侵前和入侵后，沉积物敏感无脊椎动物比例（PSI）指数生物监测工具的指数得分略有增加，但具有统计学意义（4.1，p < 0.001，95%CI：2.1，6.2），其范围可以从0到100，但对于经皮加权PSI没有观察到统计学显著差异（0.4，p = 0.742，95%CI：-2.1，2.9）或细沉积物（-2.3，p = 0.227，95%CI：-6.0，1.4）。亚组分析表明，生物监测工具评分的变化范围为4至10个百分点。重要的是，这些分组分析显示，细颗粒沉积物的变化相对较小，其中两个变化具有统计意义，但这些变化与生物监测工具的预期反应不一致。结果表明，沉积物生物监测可能会受到信号小龙虾入侵的影响，但这种影响似乎是上下文相关的，也许不是小龙虾生态活动的结果。生物监测分数的低幅度变化不太可能导致对沉积物压力的错误诊断，特别是因为这些工具应该与一套其他压力特定指数一起使用。
The North American signal crayfish (Pacifastacus leniusculus) has invaded freshwater ecosystems across Europe. Recent studies suggest that predation of macroinvertebrates by signal crayfish can affect the performance of freshwater biomonitoring tools used to assess causes of ecological degradation. Given the reliance on biomonitoring globally, it is crucial that the potential influence of invasive species is better understood. Crayfish are also biogeomorphic agents, and therefore, the aim of this study was to investigate whether sediment-biomonitoring tool outputs changed following signal crayfish invasions, and whether these changes reflected post-invasion changes to deposited fine sediment, or changes to macroinvertebrate community compositions unrelated to fine sediment.A quasi-experimental study design was employed, utilising interrupted time series analysis of long-term environmental monitoring data and a hierarchical modelling approach. The analysis of all sites (n= 71) displayed a small, but statistically significant increase between pre- and post-invasion index scores for the Proportion of Sediment-sensitive Invertebrates (PSI) index biomonitoring tool (4.1,p< 0.001, 95%CI: 2.1, 6.2), which can range from 0 to 100, but no statistically significant difference was observed for the empirically-weighted PSI (0.4,p= 0.742, 95%CI: − 2.1, 2.9), or fine sediment (− 2.3,p= 0.227, 95%CI: − 6.0, 1.4). Subgroup analyses demonstrated changes in biomonitoring tool scores ranging from four to 10 percentage points. Importantly, these subgroup analyses showed relatively small changes to fine sediment, two of which were statistically significant, but these did not coincide with the expected responses from biomonitoring tools. The results suggest that sediment-biomonitoring may be influenced by signal crayfish invasions, but the effects appear to be context dependent, and perhaps not the result of biogeomorphic activities of crayfish. The low magnitude changes to biomonitoring scores are unlikely to result in an incorrect diagnosis of sediment pressure, particularly as these tools should be used alongside a suite of other pressure-specific indices.
登录
查看更多内容
外来和本土小龙虾物种对滨海底栖群落的影响
DOI：
--
发表时间：
1999
期刊：
影响因子：
--
作者：
Per Nyström;C. Brönmark;W. Granéli
通讯作者：
W. Granéli
将长期研究与荟萃分析相结合，调查非本地小龙虾对底栖动物群落的影响
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
J. Mccarthy;C. Hein;J. Olden;M. J. Zanden
通讯作者：
M. J. Zanden
沉积沉积物和大型无脊椎动物指标的评估，用于量化农业溪流中过度沉积的生物反应
影响因子：
3.5
作者：
Andrew B. Sutherland;J. Culp;Glenn A. Benoy
通讯作者：
Glenn A. Benoy
对广泛温带河流和溪流的精细沉积物生物监测工具进行评估
影响因子：
2.7
作者：
Turley M
通讯作者：
Turley M
DOI：
10.1097/ede.0000000000000533
发表时间：
2016-11
期刊：
Epidemiology (Cambridge, Mass.)
影响因子：
--
作者：
Gasparrini A
通讯作者：
Gasparrini A