珊瑚同步產卵方式瓦解可能致其滅絕
作者:
小柯機器人發布時間:2019/9/6 12:36:51
以色列特拉維夫大學Yossi Loya團隊發現珊瑚同步產卵的方式瓦解,威脅其群體存活。相關論文發表在2019年9月6日出版的《科學》上。
他們量化了四個生殖季節期間的珊瑚產卵強度,以及息肉、群體和種群水平的實驗分析,並且證明,與歷史數據相比,來自紅海的幾個物種已失去其繁殖同步性。最終,這種同步性的瓦解降低了成功受精的可能性,導致新成員的缺乏,這可能會導致群體衰老,甚至瀕臨滅絕。
據了解,人類和自然對珊瑚礁的幹擾通常通過可見的損害來量化(例如,由於漂白事件導致珊瑚覆蓋率降低),但環境條件的變化也可能以不太明顯的方式對其造成傷害。 儘管目前的範例表明存在一致的、高度同步的產卵事件,但是通過撒播方式繁殖的珊瑚特別容易受到傷害,因為它們的生殖物候受到環境因素的影響。
附:英文原文
Title: Breakdown in spawning synchrony: A silent threat to coral persistence
Author: Tom Shlesinger, Yossi Loya
Issue&Volume:Volume 365 Issue 6457
Abstract: The impacts of human and natural disturbances on coral reefs are typically quantified through visible damage (e.g., reduced coral coverage as a result of bleaching events), but changes in environmental conditions may also cause damage in less visible ways. Despite the current paradigm, which suggests consistent, highly synchronized spawning events, corals that reproduce by broadcast spawning are particularly vulnerable because their reproductive phenology is governed by environmental cues. Here, we quantify coral spawning intensity during four annual reproductive seasons, alongside laboratory analyses at the polyp, colony, and population levels, and we demonstrate that, compared with historical data, several species from the Red Sea have lost their reproductive synchrony. Ultimately, such a synchrony breakdown reduces the probability of successful fertilization, leading to a dearth of new recruits, which may drive aging populations to extinction.
DOI: 10.1126/science.aax0110
Source:https://science.sciencemag.org/content/365/6457/1002
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037