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Pollinators necessary for the reproductive success of critically endangered mangrove, Sonneratia griffithii
Aquatic Botany ( IF 1.8 ) Pub Date : 2020-11-28 , DOI: 10.1016/j.aquabot.2020.103340
Christine Ely Nuevo-Diego , Alyssa B. Stewart , Sara Bumrungsri

Mangrove forests provide numerous ecosystem services, yet are disappearing rapidly. One such mangrove species negatively affected by deforestation and land conversion is Sonneratia griffithii, a critically endangered but under-studied species. To understand its reproductive biology, we conducted a pollination experiment and observed flower visitors that potentially pollinate this mangrove species. All experimental treatments (open pollination, insect pollination, hand-cross pollination, hand-self pollination, and spontaneous autogamy) produced fruit set to varying degrees. Results suggest that S. griffithii is suffering from inbreeding depression, as trees set few fruits even in the hand-cross (25 %) and hand-self (18 %) pollination treatments. Results also suggest that the species is dependent on pollinators, since the open (22 %) and insect pollination (18 %) treatments set 3 times as many fruits as the spontaneous autogamy treatment (6 %). Two bat species were mist-netted near S. griffithii flowers: Macroglossus minimus and Eonycteris spelaea. To protect this mangrove species, we recommend encouraging cross pollination by bats through local area and pollinator protection, as well as creating corridors between mangrove forest patches.



中文翻译:

极度濒危的红树林Sonneratia griffithii繁殖成功所必需的授粉媒介

红树林提供了许多生态系统服务,但正在迅速消失。受森林砍伐和土地流转负面影响的这类红树林物种之一是Sonneratia griffithii,这是一种极度濒危但未被充分研究的物种。为了了解其生殖生物学,我们进行了授粉实验,并观察了可能使该红树林物种授粉的访客。所有实验处理(开放授粉,昆虫授粉,手交授粉,手自授粉和自发自交)都在不同程度上产生了结实的果实。结果表明格里菲斯链球菌正遭受近交抑郁症的困扰,因为即使在人工授粉(25%)和人工(18%)授粉处理中,树木也很少结出果实。结果还表明该物种依赖于传粉媒介,因为开放(22%)和昆虫授粉(18%)处理的结实率是自发自交配子处理(6%)的3倍。两种蝙蝠物种在S. griffithii花附近被雾状网包围Macroglossus minimusEonycteris spelaea。为了保护该红树林物种,我们建议鼓励蝙蝠通过局部地区和传粉媒介保护进行异花授粉,并在红树林之间建立走廊。

更新日期:2020-12-07
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