Ecological thresholds of dissolved oxygen (DO) and sedimentary hydrogen sulfide (HS) for macrozoobenthos were examined during a 30-month monitoring of two stations in a highly eutrophic canal in inner Tokyo Bay, Japan. Bottom DO and HS concentrations fluctuated seasonally, and were significantly correlated with water and sediment temperatures. Red tide-derived phytodetritus was a major source of sediment organic matters in the canal bottom, and the sediment became highly reduced and sulfidic condition in warmer months (sedimentary HS; up to 8.5 mM). Dominant opportunistic taxa, including polychaetes and amphipods, were eliminated under low DO and high HS conditions (i.e., population thresholds), and devastation of community structure occurred at 2.4-3.3 mg l DO and 1.8-2.7 mM HS (i.e., community thresholds). To maintain ecosystem function in anthropogenically degraded habitats and ensure colonization by macrozoobenthos throughout the year, DO and HS levels should be maintained below these thresholds.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.marenvres.2018.02.007 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Concentration, distribution, and risk assessment of polychlorinated biphenyl compounds in surface sediments of the Persian Gulf and the Oman Sea.
Environ Sci Pollut Res Int
December 2024
Department of Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
This study involved analyzing 76 sediment samples from the Persian Gulf and Oman Sea. The concentration of 18 prevalent PCB congeners was determined. Results indicated that the highest concentration of PCB-52, reaching 636.
View Article and Find Full Text PDFComprehensive assessment of pollution status, health risks and source apportionment of heavy metals in surface wetland soils of Yellow River Delta using Monte Carlo simulation and positive matrix factorization.
Environ Geochem Health
December 2024
College of Resources and Environment, Key Laboratory of Agricultural Environment, Shandong Agricultural University, Tai'an, 271000, China.
Excessive heavy metals (HMs) exposure in surface soils may cause non-negligible health risks to human beings; however, the potential health risk assessment of HMs in Yellow River Delta wetland (YRDW) soils has rarely been evaluated. In this study, we sampled surface wetland soils from ten typical functional areas in YRDW, assessed the HMs pollution status, evaluated their potential health risks, stimulated their probabilistic distributions of health risks and analyzed their potential source apportionment using Positive matrix factorization and Monte Carlo simulation. Enrichment factor (EF) and geo-accumulation index (I) indicated significant anthropogenic impacts, particularly in oil-contaminated sites, while Sediment Quality Guidelines (SQGs) comparison results suggested potential ecological risks, especially for As and Ni, which were occasionally above threshold effect levels.
View Article and Find Full Text PDFThe genus has been extensively used as a model for ecological, behavioral, and evolutionary investigations. We used auditory brainstem responses (ABRs), craniofacial morphology, and pinna measurements to compare characteristics that impact hearing in two wild-caught species, . We observed significant statistical differences in craniofacial and pinna attributes between species with overall exhibiting larger features than .
View Article and Find Full Text PDFBeyond predation: Fish-coral interactions can tip the scales of coral disease.
J Theor Biol
December 2024
Agricultural and Ecological Research Unit, Indian Statistical Institute, 203, B.T. Road, Kolkata, 700108, West Bengal, India.
Coral reefs are critical ecosystems, fostering biodiversity and sustaining the livelihoods of millions globally. Nonetheless, they confront escalating threats, with infectious diseases emerging as primary catalysts for extensive damage, surpassing the impacts of other human-induced stressors. Disease transmission via biotic factors, particularly during fish predation, is a crucial yet often overlooked pathway.
View Article and Find Full Text PDFScreening of priority antibiotics in Fenhe River Basin based on the environmental exposure, ecological effects, and human health risk.
Chemosphere
December 2024
Shanxi Key Laboratory of Sorghum Genetic and Germplasm Innovation, Sorghum Research Institute, Shanxi Agricultural University, Jinzhong 030600, China.
Antibiotics in surface water have attracted increasing attention because of their potential threats to aquatic ecosystems and public health. Therefore, it is crucial to develop a priority antibiotic list and establish a regulatory framework for antibiotic control. Taking the Fenhe River Basin in North China as the study area, a method to rank priority antibiotics based on their environmental exposure, ecological effects, and human health risks was established.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!