Large-scale comparison of biomass and reproductive phenology among native and non-native populations of the seagrass Zostera japonica
Large-scale comparison of biomass and reproductive phenology among native and non-native populations of the seagrass Zostera japonica
复制标题
DOI：
10.3354/meps13884
复制
发表时间：
2021-09
影响因子：
2.5
通讯作者：
M. Ito;HJ Lin;M. O'Connor;M. Nakaoka
中科院分区：
文献类型：
--
作者：
M. Ito;HJ Lin;M. O'Connor;M. Nakaoka
沿纬度或温度梯度的大尺度分析是探索光和温度在控制海草物候中的潜在作用的有效方法。本研究探讨了纬度和温度对海草生物量和繁殖季节的影响。潮间带海草（Zostera japonica）是一种潮间带海草，具有广泛的纬度分布，在亚洲原产地从热带扩展到温带，在北美也有非原产地分布。我们从出版物和我们自己的观察中整理了现有的物候特征数据（生物量或繁殖高峰的时间，生物量生长和繁殖季节的持续时间，最大生物量或繁殖比）。性状在不同地理组间进行了比较：亚洲-热带、亚洲-温带和北美-温带。我们进一步研究了3个种群的性状与纬度和温度之间的关系：亚洲、北美和所有种群。结果表明，不同地理类群在最大生物量、最高繁殖时间和最大繁殖比上存在显著差异，但在其他性状上差异不显著。亚洲和所有种群的最大生物量和高峰繁殖时间与纬度和温度显著相关。最大生物量在中纬度或中温地区最高，向分布范围极限方向递减，在高纬度或较冷的地点，繁殖高峰发生在一年中较晚的时间。北美种群在高纬度地区表现出较短的生长期和较高的繁殖率。在北美种群中观察到的不同反应可能反映了引进的影响。我们的研究显示了地理区域之间以及本地和非本地人口之间的潜在差异。
Large-scale analysis along latitude or temperature gradients can be an effective method for exploring the potential roles of light and temperature in controlling seagrass phenology. In this study, we investigated effects of latitude and temperature on seagrass biomass and reproductive seasonality. Zostera japonica is an intertidal seagrass with a wide latitudinal distribution expanding from tropical to temperate zones in its native range in Asia, with an additional non-native distribution in North America. We collated available data on phenological traits (timings of peak biomass or reproduction, durations of biomass growth and reproductive season, and maximum biomass or reproductive ratio) from publications and our own observations. Traits were compared among geographic groups: Asia-tropical, Asia-temperate, and North America-temperate. We further examined relationships between traits and latitude and temperature for 3 population groups: Asian, North American, and all populations. Our analysis revealed significant variation among geographic groups in maximum biomass, peak reproductive timing, and maximum reproductive ratio, but not in other traits. Maximum biomass and peak reproductive timing for Asian and all populations were significantly correlated with latitude and temperature. Maximum biomass was highest at mid-latitudes or intermediate temperatures and decreased toward distribution range limits, and peak reproductive timing occurred later in the year at higher latitudes or cooler sites. North American populations showed shorter growth durations and greater reproductive ratios at higher latitude. Different responses observed for North American populations may reflect effects of introduction. Our study demonstrates potential variation among geographic regions and between native and non-native populations.