Claudia L. Tejada-Begazo, L. Calderón-Aguilera, A. López-Pérez, R. A. Cabral‐Tena
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引用次数: 0
Abstract
Abstract: The aim of this study is to explore if sexual reproduction is present in scleractinian corals at the northern limit of their distribution (28.980° N, 113.470° W) in a zone subject to upwelling and seasonal variations in sea surface temperature, and sampling was performed from August 2018 to October 2019. We placed 42 terracotta recruitment tiles in Bahía de los Ángeles, Baja California. Coral cover was estimated, and the height, major diameter, and minor diameter of coral colonies were measured. Astrangia haimei and Porites panamensis recruits were identified on the recruitment tiles, constituting the first quantitative record for the northeastern tropical Pacific. Recruitment of P. panamensis was higher (Llave: 63.09 ± 114 ind m–2 y–1, Rasito: 3.21 ± 7 ind m–2 y–1), while A. haimei recruitment at the same sites was 3.85 ± 8 and 1.93 ± 6 ind m–2 y–1, respectively. Recruitment differences between locations were attributed to coral cover (the abundance of Porites panamensis is 15-fold greater in Llave than in Rasito) and colony size (P. panamensis Llave: 10.53 ± 5.93 cm, Rasito: 4 ± 0.63 cm). Both SST and Chl-a concentrations were also highly correlated with coral recruitment, with higher recruitment rates observed in the warmer seasons when high nutrient concentrations were also present. In contrast to other sites in the eastern tropical Pacific, the highest rate of recruitment was reported at this study (high-latitude coral community), which, according with the positive high latitude trend reported by other studies, is likely due to climate change.
摘要:本研究的目的是探索巩膜珊瑚在其分布的北部界限(28.980°N,113.470°W)是否存在有性繁殖,该区域受上升流和海面温度季节变化的影响,采样时间为2018年8月至2019年10月。我们在下加利福尼亚州的Bahía de losÁngeles放置了42块陶土招聘瓷砖。估计了珊瑚覆盖率,并测量了珊瑚群落的高度、大直径和小直径。在招募瓷砖上发现了Astrangia haimei和Porites panamensis的新兵,这是东北热带太平洋的第一个数量记录。巴拿马P.panamensis的吸收率较高(Llave:63.09±114 ind m–2 y–1,Rasito:3.21±7 ind m-2 y–2),而海梅A.haimei在相同地点的吸收率分别为3.85±8和1.93±6 ind m-2 y–1。不同地点之间的招募差异归因于珊瑚覆盖(在Llave,panamensis Porites的丰度是Rasito的15倍)和菌落大小(P.panamensis Llave:10.53±5.93厘米,Rasito:4±0.63厘米)。SST和Chl-a浓度也与珊瑚的补充高度相关,在温暖的季节也存在高营养浓度时,观察到更高的补充率。与热带太平洋东部的其他地点相比,本研究报告的招募率最高(高纬度珊瑚群落),根据其他研究报告的积极高纬度趋势,这可能是由于气候变化。
期刊介绍:
Pacific Science: A Quarterly Devoted to the Biological and Physical Sciences of the Pacific Region
The official journal of the Pacific Science Association. Appearing quarterly since 1947, Pacific Science is an international, multidisciplinary journal reporting research on the biological and physical sciences of the Pacific basin. It focuses on biogeography, ecology, evolution, geology and volcanology, oceanography, paleontology, and systematics. In addition to publishing original research, the journal features review articles providing a synthesis of current knowledge.