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| Development of a nitrophobe/nitrophile classification for sand dunes | |
| 出版日期 | 2017 |
| 出版者 | Scottish Environment Protection Agency (SEPA) |
| 英文摘要 | Both dry dune habitats and wet dune slack communities of sand dunes are known to be sensitive to N deposition. However, despite their biological importance, they are not currently covered within the nitrophobe/nitrophile assessment methodology. This study aimed to develop indicators for sand dune communities. We developed lists of nitrophile indicator species, focusing on those above a threshold Ellenberg N value, defined in relation to the 80th percentile Ellenberg N of component NVC communities. Species lists were extracted from the NVC manual for dune habitats. The method differs slightly from that in Pitcairn et al. (2006) who developed both nitrophile and nitrophobe indicators. In the approach taken here it was decided not to include nitrophobe species, but to focus on nitrophiles expected to increase with eutrophication. The index for any quadrat of plant data is calculated as the sum of percentage cover of listed nitrophile indicator species for the relevant dune habitat type. UK-wide data were used to develop and test the indicators. This approach is generalizable to any situation in which the dune species have Ellenberg indicator values defined (i.e. primarily temperate Europe). Local benchmarking of indicator values against N deposition would be required to develop absolute values for the metrics in a new situation. Testing of the indicators against survey data showed a high degree of scatter in individual quadrats, but site means showed broadly positive relationships with N deposition. Testing of the dune slack indicator against an N-gradient in groundwater at a single site also showed some promise. However, this initial testing is based on limited datasets. We recommend more extensive testing of the indicators against wider datasets, and to consider including terricolous lichens as a component of the indicator in the acidic dune grasslands habitat |
| URL | 0 |
| 国家 | 英国 |
| 语种 | 英语 |
| 来源机构 | 英国自然环境研究理事会 |
| 文献类型 | 科技报告 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/86605 |
| 推荐引用方式 GB/T 7714 | . Development of a nitrophobe/nitrophile classification for sand dunes:Scottish Environment Protection Agency (SEPA),2017. |
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