The endemic bull kelp Durvillaea willana Lindauer grows on South and Stewart/Rakiura Islands, with a small North Island population on the northern Wairarapa coast. Drawing on field observations, the distribution of this species is mapped. Within its biogeographic range, there are three lengthy tracts of rocky shore where the kelp is conspicuously absent. These distributional gaps are: Wellington’s south coast (despite proximity to populations on the South Island side of Cook Strait), the southern and central Wairarapa Coast, and in South Westland. Theorising that these gaps have been caused by earthquake-driven coastal uplift, this paper examines the effects on Durvillaea species of a 7.8 Mw earthquake in 2016, which raised around 100 km of seashore along the Kaikōura coast, plus the historical evidence of uplift along the Akatore Fault, south of Dunedin. This evidence suggests that the requirements for such local extinctions are that the uplift is consistently higher than the kelp’s vertical range, and that it occurs along an entire rocky coastal tract flanked by barriers to recolonisation such as long beaches or deep ocean–major obstacles to a non-buoyant kelp with poor dispersive ability.

地方性公海带杜鹃花willana Lindauer生长在南部和斯图尔特/拉基拉群岛上，北怀拉拉帕海岸的北部岛屿人口很少。利用实地观察，绘制了该物种的分布图。在其生物地理范围内，有三个长长的岩石海岸，其中明显没有海带。这些分布差距包括：惠灵顿的南部海岸（尽管靠近库克海峡南岛一侧的人口），南部和中部的怀拉拉帕海岸和南部韦斯特兰。从理论上讲这些差距是由地震驱动的沿海隆起引起的，本文研究了对杜氏藻的影响这是2016年发生的7.8兆瓦地震的一种，在沿凯库拉海岸上升了约100公里的海岸，还有但尼丁以南阿卡托雷断裂带隆升的历史证据。这些证据表明，对这种局部灭绝的要求是，隆升持续高于海带的垂直范围，并且沿着整个岩石沿海地带，两侧是重新定殖的障碍，例如长滩或深海，这是海带隆升的主要障碍。非浮力海带，分散能力差。