Decay of Rhizophora apiculata(Blume)and Xylocarpus granatum(Koenig)detrital sources in the Sarawak Mangrove,Malaysia  

作　　者：Abu Hena Mustafa Kamal Mohammed Muzammel Hoque Mohd Hanafi Idris Osumanu Haruna Ahmed Md.Khurshid Alam Bhuiyan Md.Masum Billah Md.Nesarul Hoque Zamri Rosli 

机构地区：[1]Department of Animal Science and Fishery,Faculty of Agriculture and Food Sciences,Universiti Putra Malaysia Campus Bintulu,97008 Bintulu,Sarawak,Malaysia [2]School of Fisheries and Aquaculture Sciences,Universiti Malaysia Terengganu,21030 Kuala Terengganu,Terengganu Darul Iman,Malaysia [3]Department of Crop Science,Faculty of Agriculture and Food Sciences,University Putra Malaysia Bintulu Sarawak Campus,97008 Bintulu,Sarawak,Malaysia [4]Department of Physical Chemistry,Faculty of Marine and Environmental Sciences,University of Cadiz,Puerto Real Campus,Poligono San Pedro s/n Puerto Real,11519 Cadiz,Spain [5]The United Graduate School of Agriculture Sciences,Kagoshima University,1-21-24 Korimoto,Kagoshima 890-0056,Japan [6]Department of Forestry,Faculty of Agriculture and Food Sciences,Universiti Putra Malaysia Bintulu Sarawak Campus,97008 Bintulu,Sarawak,Malaysia

出　　处：《Journal of Forestry Research》2020年第2期613-623,共11页林业研究（英文版）

摘　　要：Decaying mangrove detritus plays a significant role in nutrient cycling and fueling in both the forests and aquatic habitats where the detritus stems from estuarine and coastal food webs.Detrital decay rates partly depend on the type of detritus,but most studies have thus far focused on leaf litter decay and decomposition,whereas other detrital sources(except for roots)have largely been ignored.We compare the decay rates of Rhizophora apiculata and Xylocarpus granatum non-leafy detritus(flowers,propagules,stipules,and twigs)with mangrove leaf litter in field studies,using litter bags during the dry and the wet seasons in the tropical mangrove forest of Sibuti,Sarawak,Malaysia.We observed higher microbial decay rates of stipules,flowers,propagules,and twigs for both the R.apiculata and X.granatumduring the wet months.By contrast,leaf decay rates were higher during the dry months.Decay rates depended on the lignin content of the detrital sources of both species,both during dry and wet months.Accordingly,the half-life(T0.5)and 95%lifespan(T0.95)of non-leaf materials(flowers,propagules,stipules and twigs)for both species were remarkably longer than those of leaf litter.Slowly decaying non-leafy detritus may play a significant role in nutrient and carbon cycling over longer time,when leaf litter is either being decomposing rapidly and/or being washed away by tidal flush and river runoff.Hence,non-leafy(flowers,propagules,stipules and twigs)detritus should be taken into account when budgeting organic matter turnover in mangroves.

关 键 词：Microbial decay Decay constants Non-leafy detritus Sibuti mangrove MALAYSIA 

分 类 号：S714[农业科学—林学]