2016 Keith Hiscock Lundy Intertidal Survey of Gannet's Rock

Keith Hiscock, Sarah Fowler, Greg Lingard, and Esther Hughes surveyed the granite boulder intertidal community at Gannet's Rock, Lundy. The aim of the survey was to re-survey the place where L.A.Harvey had surveyed in 1949. Gannet's Rock was reached by Lundy Islands RIB (driven by Derek Green) which departed from Landing Bay. After the Gannet's rock survey, the survey team also noted some species found at Devil's Kitchen.
Description of site surveyed: A broken shore of granite bedrock with some very large boulders that created cavities and extensive areas of overhanging rock. Smaller boulders were present between bedrock and boulders that could be turned to investigate underboulder communities. There were a few pebbles. There was a basalt dyke that ran across the shore towards low water. The shore exhibited a ‘classic’ zonation from yellow and grey lichens to Verrucaria maura with Lichina pygmaea and, lower down the shore, Verrucaria mucosa. Littorina neritoides were frequent in the V. maura zone and amongst Chthamalus montagui further down. The shore was a ‘limpet-barnacle’ shore but with some large patches of Ascophyllum nodosum (with Polysiphonia lanosa), extensive patches of Cladophora rupestris especially in ‘wet places’ and patches of Fucus vesiculosus around midshore level. Toothed topshells Phorcus lineatus were frequent overall but abundant in clusters. On the lower shore, Laminaria digitata was the characterising species with L. hyperborea in the sublittoral fringe. (Alaria esculenta and L. ochroleuca were looked for but not found.) The low spring tide revealed only Echinus esculentus and Marthasterias glacialis as sublittoral species.

Keith Hiscock、Sarah Fowler、Greg Lingard和Esther Hughes对伦迪岛（Lundy）甘尼特岩（Gannet's Rock）的花岗岩巨石潮间带群落展开调查，旨在重新考察L.A.Harvey于1949年研究过的区域。调查团队乘坐从登陆湾（Landing Bay）出发的伦迪岛刚性充气艇（RIB，由Derek Green驾驶）抵达甘尼特岩，调查结束后还记录了魔鬼厨房（Devil's Kitchen）的部分物种。
调查地点描述：花岗岩基岩构成的破碎海岸，巨型巨石形成洞穴与大片悬岩区；基岩与巨石间散布可翻转的小块岩石，便于探查石下生物群落，另有少量卵石分布。一条玄武岩岩脉横穿海岸延伸至低潮线。海岸呈现典型分带：从黄灰色地衣过渡到莫拉黑壳衣（Verrucaria maura）与矮小黑角衣（Lichina pygmaea）共生带，低潮区则为粘膜黑壳衣（Verrucaria mucosa）带。滨螺（Littorina neritoides）常见于莫拉黑壳衣带，更下方的蒙氏小藤壶（Chthamalus montagui）群落中亦有分布。该海岸属“帽贝-藤壶”型，但存在大片岩藻（Ascophyllum nodosum，附生毛枝藻Polysiphonia lanosa）、潮湿区广泛分布的石生刚毛藻（Cladophora rupestris）及中潮带的墨角藻（Fucus vesiculosus）斑块。线纹滨螺（Phorcus lineatus）整体常见且集群密集。低潮带特征物种为掌状海带（Laminaria digitata），亚潮带边缘有长海带（Laminaria hyperborea）（未发现翅藻Alaria esculenta及黄海带Laminaria ochroleuca）。大潮低潮仅观测到可食用海胆（Echinus esculentus）与冰川海星（Marthasterias glacialis）两种亚潮带物种。