Phytoplankton community succession and dynamics using optical approaches
نویسندگان
چکیده
The phytoplankton in coastal regions are responding to constant environmental changes, thus the use of proxies derived from situ frequent time-series observations and validated traditional microscopic or pigment methods can be a solution for detecting rapid responses community dynamics succession. In this study, we combined high-frequency (every 30 min May September 2017) optical hydrographic data moored buoy weekly discrete samplings track succession Mausund Bank, highly productive region coast Norway. Three regimes were observed: mixing period (MP) spring, onset stratification (transient period, TP) summer stratified (SP) fall, with occasional strong winds that disrupted surface beginning September. A bloom dominated by diatom Skeletonema costatum was observed MP due intense nutrient availability, while flagellates prevailed nutrient-poor waters during TP, followed rhizosolenid diatoms (Proboscia alata Guinardia delicatula), when peaked. mixed assemblage (e.g. Pseudo-nitzschia), coccolithophores dinoflagellates occurred SP, as reintroduced nutrients waters. Through (chemotaxonomy) observations, tested, first time region, whether an ‘optical index’ measurements chlorophyll fluorescence (Fchla) particulate backscattering (bbp) is suitable differentiate between versus flagellate dominance. We found negative relationship Fchla:bbp diatom:flagellate, contrary previous possibly because influence non-algal contribution zooplankton, fecal pellets detritus) bbp pool systems. This finding suggests such not universal other parameters needed refine index regions.
منابع مشابه
Phytoplankton-Associated Bacterial Community Composition and Succession during Toxic Diatom Bloom and Non-Bloom Events
Pseudo-nitzschia blooms often occur in coastal and open ocean environments, sometimes leading to the production of the neurotoxin domoic acid that can cause severe negative impacts to higher trophic levels. Increasing evidence suggests a close relationship between phytoplankton bloom and bacterial assemblages, however, the microbial composition and succession during a bloom process is unknown. ...
متن کاملEffects of Nutrients, Temperature and Their Interactions on Spring Phytoplankton Community Succession in Lake Taihu, China
We examined the potential effects of environmental variables, and their interaction, on phytoplankton community succession in spring using long-term data from 1992 to 2012 in Lake Taihu, China. Laboratory experiments were additionally performed to test the sensitivity of the phytoplankton community to nutrient concentrations and temperature. A phytoplankton community structure analysis from 199...
متن کاملTemporal Succession of Ancient Phytoplankton Community in Qinghai Lake and Implication for Paleo-environmental Change
Tibetan lake sediments in NW China are sensitive recorders of climate change. However, many important plankton members do not leave any microscopic features in sedimentary records. Here we used ancient DNA preserved in Qinghai Lake sediments to reconstruct the temporal succession of plankton communities in the past 18,500 years. Our results showed that seven classes and sixteen genera of phytop...
متن کاملPhytoplankton Succession in Recurrently Fluctuating Environments
Coastal marine systems are affected by seasonal variations in biogeochemical and physical processes, sometimes leading to alternating periods of reproductive growth limitation within an annual cycle. Transitions between these periods can be sudden or gradual. Human activities, such as reservoir construction and interbasin water transfers, influence these processes and can affect the type of tra...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Continental Shelf Research
سال: 2021
ISSN: ['1873-6955', '0278-4343']
DOI: https://doi.org/10.1016/j.csr.2020.104322