First record of Chaetomorpha ligustica (Cladophoraceae, Cladophorales) smothering the seagrass Zostera muelleri in a New Zealand estuary

IF 1.4 4区环境科学与生态学 Q3 FISHERIES

New Zealand Journal of Marine and Freshwater Research Pub Date : 2022-01-09 DOI:10.1080/00288330.2021.2013261

Iñigo Zabarte-Maeztu, R. D’archino, F. Matheson, M. Manley-Harris, I. Hawes

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引用次数: 2

Abstract

ABSTRACT The filamentous green alga Chaetomorpha ligustica (Cladophoraceae, Cladophorales) was recorded covering seagrass meadows at Pāuatahanui Inlet, New Zealand. Species of the genus Chaetomorpha are difficult to identify by their morphologically, and the identification of C. ligustica was confirmed by sequencing the 28S rRNA large subunit providing a high level of confidence in the species designation. In November 2019, we found C. ligustica intertwined with Ulva spp. forming dense, heavy and entangled structures. Here we report, for the first time, negative impacts of this species upon meadows of the New Zealand seagrass Zostera muelleri. We observed a significant loss of seagrass cover and evidence of anoxia under C. ligustica mats two weeks from the first sighting. Chaetomorpha ligustica can easily be misidentified in the field. This may lead to over- and under-reporting of species, and we recommend the need for more careful identification of macroalgal blooms in the future and further research on growth requirements and origins of strains.

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新西兰河口首个记录的羽状毛藻(羽状毛藻科，羽状毛藻目)窒息海草Zostera muelleri

摘要：在新西兰Pāuatahanui湾的海草草地上，记录到丝状绿藻女贞藻（枝藻科，枝藻目）。Chaetomorpha属的物种很难从形态学上进行鉴定，而女贞子的鉴定是通过对28S rRNA大亚基进行测序来确认的，这为物种命名提供了高水平的可信度。2019年11月，我们发现女贞子与Ulva spp.交织在一起，形成密集、沉重和纠缠的结构。在这里，我们首次报道了该物种对新西兰海草Zostera muelleri草地的负面影响。我们观察到，从第一次发现到两周后，海草覆盖显著减少，并有证据表明女贞子垫下缺氧。女贞毛在野外很容易被误认。这可能导致物种报告过多和过少，我们建议未来需要更仔细地识别大型藻类水华，并对菌株的生长要求和起源进行进一步研究。

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来源期刊

New Zealand Journal of Marine and Freshwater Research 生物-海洋学

CiteScore

4.50

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： Aims: The diversity of aquatic environments in the southern continents and oceans is of worldwide interest to researchers and resource managers in research institutions, museums, and other centres. The New Zealand Journal of Marine and Freshwater Research plays an important role in disseminating information on observational, experimental, theoretical and numerical research on the marine, estuarine and freshwater environments of the region.