Shaffer Megan R, Davy Simon K, Maldonado Manuel, Bell James J
Biol Bull. 2020 Apr;238(2):89-105. doi: 10.1086/708624. Epub 2020 Apr 21.
Marine organisms that rely on environmental cues for reproduction are likely to experience shifts in reproductive phenology and output due to global climate change. To assess the role that the environment may play in the reproductive timing for temperate sponges, this study examined sexual and asexual reproduction in New Zealand sponge species ( and the complex) and correlated reproductive output with temperature, chlorophyll- concentration, and rainfall. Histological analyses of sponges collected monthly (from February 2015 to February 2017) revealed that these sponges are oviparous and gonochoristic and that they sexually reproduce annually during the austral summer. Both monthly collections and monitoring revealed that spp. asexually bud continuously, but with greater intensity in the austral spring and summer. Temperature was positively associated with both sexual reproduction and budding, with seasonal cues appearing important. Future shifts in the environment that alter such cues are expected to affect population dynamics of these sponges.
依赖环境线索进行繁殖的海洋生物，很可能会因全球气候变化而在繁殖物候和繁殖产出方面发生变化。为评估环境在温带海绵繁殖时间方面可能发挥的作用，本研究调查了新西兰海绵物种（和复合体）的有性和无性繁殖情况，并将繁殖产出与温度、叶绿素浓度及降雨量进行关联分析。对每月（2015年2月至2017年2月）采集的海绵进行组织学分析表明，这些海绵为卵生且雌雄异体，它们在南半球夏季每年进行一次有性繁殖。每月采集及监测均显示，物种持续进行无性出芽繁殖，但在南半球春季和夏季强度更大。温度与有性繁殖和出芽繁殖均呈正相关，季节线索似乎很重要。预计未来环境变化改变此类线索将影响这些海绵的种群动态。
