以上来源于: WordNet
"Signal crayfish are having a catastrophic impact on white clawed crayfish", said Abby Stancliffe-Vaughan, who is organising the study.
BBC: Study may help endangered white clawed crayfish
The Rev Holtam takes over the position from the Rt Rev Dr David Stancliffe who retired after 17 years last September.
BBC: New bishop is appointed to Diocese of Salisbury
Ms Stancliffe-Vaughan, a PhD student, said the biodiversity of the rivers was also under threat due to the erosion and siltation caused by the signal crayfish.
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