从2022年2月至2023年1月,在热带中子河中对低潮(LT)和高潮(HT)期间的浮游植物动态进行了比较评估,Manori,孟买,印度。总的来说,记录了124种浮游植物。HT导致比LT(102种)更大的物种丰富度(124种)和多样性指数(香农-维纳指数)。Pielou的均匀度(J\')和Simpson的优势指数(1-D)没有显示出潮汐的显着波动,因为海洋浮游植物物种随着潮汐而有节奏地进出小溪。总的来说,季节性丰度在季风前的HT(5.79×103u/L)最高,在季风中的LT(0.45×103u/L)最低,而空间丰度在HT的S1处最大(HT-4.04×103u/L),在LT的S3处最低(LT-0.75×103u/L)。硅藻的丰度(HT为1.83×103u/L和3.82×103u/L)和多样性(LT为77,HT为92)占主导地位。诸如Coscinosdiscuscentralis之类的物种,Coscinodiscusgranii,Coscinodiscusradiatus,TriopsFurca,Melosiravarians,Nitzchsiapalea,Chaetocerosaffinis,骷髅marinoi,Stephanocyclusmeneghinianus,小溪中主要的原生居民是浮游菌和肉芽肿。SIMPER分析表明,最大的相似性是在季风期间(47.65%),最小的是在LT季风前期间(38.10%)。然而,在HT中,浮游植物的最大相似性转移到季风后(63.85%),季风前最小(46.71%)。丰富度(d\')和香农多样性(H\')的平均值显示系统中浮游植物的多样性中等。典型对应分析表明,环境参数(水温>pH>硝酸盐>盐度>DO>Alk>硅酸盐)对潮汐浮游植物群落的分布影响较大。因此,已经发现,潮汐在中子河环境中浮游植物群落的分布和丰度中起着重要作用。
A comparative assessment of phytoplankton dynamics during low tide (LT) and high tide (HT) was conducted from February 2022 to January 2023 in a tropical mesotidal creek, Manori, Mumbai, India. In total, 124 phytoplankton species were recorded. The HT resulted in greater species richness (124 species) and diversity indices (Shannon-Wiener\'s index) than the LT (102 species). The Pielou\'s evenness (J\') and Simpson\'s dominance index (1-D) did not show significant fluctuations with the tides due to the marine phytoplankton species moving rhythmically in and out of the creek with the tides. Overall, the seasonal abundance was maximum during pre-monsoon at HT (5.79 × 103 u/L) and lowest in monsoon at LT (0.45 × 103 u/L), whereas spatial abundance was maximum at S1 (HT- 4.04 × 103 u/L) at HT and lowest at S3 (LT- 0.75 × 103 u/L) at LT. The
diatoms dominated in their abundance (1.83 × 103 u/L and 3.82 × 103 u/L in HT) and diversity (77 in LT and 92 in HT). The species such as Coscinodiscus centralis, Coscinodiscus granii, Coscinodiscus radiatus, Triops furca, Melosira varians, Nitzchsia palea, Chaetoceros affinis, Skeletonema marinoi, Stephanocyclus meneghinianus, Planktoniella sol and Skeletonema costatum were the dominant native residents in the creek. SIMPER analysis revealed that the maximum similarity was during the monsoon (47.65%), and the minimum was during the pre-monsoon (38.10%) at LT. However, in HT, the maximum similarity of phytoplankton shifted to post-monsoon (63.85%) and the minimum during the pre-monsoon (46.71%). The mean value of richness (d\') and Shannon\'s diversity (H\') showed a moderate phytoplankton diversity in the system. The environmental parameters (water temperature > pH > nitrate > salinity > DO > Alk > silicate) have a greater influence on the distribution of the phytoplankton community with tides as revealed by the Canonical correspondence analysis. Therefore, it has been found that tides play a significant role in the distribution and abundance of the phytoplankton community in a mesotidal creek environment.