Oceans at Risk!

Huber, Michael

doi:10.1016/s0025-326x(98)90163-1

Cited by 9 publications

(3 citation statements)

References 5 publications

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“…High concentrations of suspended sediment, however, can negatively impact water quality and lead to reduced survival of aquatic fauna and flora. Adverse effects include the burial of bottom-dwelling organisms and surfaces, decreased penetration of light in the water column, changes to nutrient balance and water circulation, increased turbidity, and coastline alteration (Fischetti, 2001;Huber, 1999;Julien, 2010). Lastly, as sediment particles absorb warmth from the sun, suspended sediments can increase water temperature causing further stress to some species (Environment and Climate Change Canada, 2016).…”

Section: Inshore Sedimentation and Its Effectsmentioning

confidence: 99%

Terrestrial cultural landscapes changed inshore marine ecosystems: Eight centuries of shellfish harvesting from the Kawela Mound site, Hawaiian Islands

Rogers,

Weisler

2024

The Holocene

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Through unfamiliar and at times marginal environments, successful colonisation of the Pacific Islands relied upon the introduction of domesticated flora and fauna as well as widespread burning to reduce forests and lowland vegetation for agricultural production. These transformations led to the extinction of avifauna, the reduction of forests, and extensive slope erosion and sedimentation into valleys and along shorelines. To date, most attention has been paid to human-induced changes to the terrestrial landscape. In this paper we present the archaeomalacological results from the deeply stratified coastal Kawela Mound, one of the oldest habitation sites in the Hawaiian Islands, with occupation beginning during the 12th century AD. We describe how anthropogenic change of the terrestrial landscape caused sediment run-off, increased shoreline turbidity, and progradation of the adjacent shoreline altering marine habitats, which is recorded in the diversity, size, and habitat preference of food shellfish harvested over nearly eight centuries. The construction of ancient stone-walled fishponds along the littoral shore provided an artificial rocky habitat for shellfish otherwise uncommon along the sandy coast. Consequently, AMS dated layers containing these shellfish provide an indirect avenue for determining the chronology of stone-walled fishponds, the construction of which was directed under the aegis of elites and thus one of the hallmarks of increasing social complexity during the last two centuries before Contact in the late 18th century.

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Section: Inshore Sedimentation and Its Effectsmentioning

confidence: 99%

Terrestrial cultural landscapes changed inshore marine ecosystems: Eight centuries of shellfish harvesting from the Kawela Mound site, Hawaiian Islands

Rogers,

Weisler

2024

The Holocene

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“…Sediments supply nutrients to flora and fauna, which are essential for the existence of aquatic life. 3 Ecological nutrition cycles, pollutants, and water quality dynamics rely heavily on sediments. 4 Sediments constitute a significant component of the riverine body, which serve as sinks as well as a source of potentially toxic elements (PTEs).…”

Section: Introductionmentioning

confidence: 99%

Assessment of Heavy Metal Pollution Associated with Surface Sediment Contamination in the Bhima River, Karnataka, India

Chinmalli

Vijaykumar

2022

Curr. World Environ

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The quality of the sediment is negatively impacted by the concentration of potentially toxic elements (PTEs). The Bhima River, which supports a sizable population and is a significant location for agricultural production, is susceptible to PTEs pollution. In this research, we examined concentration of potentially toxic elements (PTEs) with Zinc(Zn), Copper(Cu), Iron(Fe), Manganese(Mn), Cadmium(Cd), and Lead(Pb) in sediment samples collected from eight different chosen sites near temples where rituals are performed, close to farming activities, bridge structures, and sewage sludge dumping areas during the period of October 2020 to September 2021. PTEs were detected using Atomic Absorption Spectrophotometry (AAS). The obtained results have been out into succeeding arrangement Fe>Mn>Cu>Zn>Pb>Cd. To evaluate the pollution status, the geo accumulation index (Igeo), enrichment ratio (ER), and pollution load index (PLI) were used for measuring sediment contamination. ER values for Cu, Mn, Pb, and Cd were greater than 5, indicating a significant level of contamination by these metals. The ER demonstrated that high Cd was present at almost all sampling sites. Cu had the greatest Igeo values at the S3 site, while Cd had the highest Igeo values in all the sites. According to the PLI, site S4 was more polluted. This evidence points to a lithogenic effect on the river's metal contamination. Cu, Mn, and Cd concentrations are expected to have a negative impact on benthic organisms. Furthermore, principal component analysis and cluster analysis discovered as agricultural run-off, bridge building, lead battery use, and sewage sludge were the leading causes of sediment quality degradation in the research area. It is vital to monitor the PTEs concentration in this sediment regularly because of its long-term effect.

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“…Sedimentation has harmful effects on the environment and different habitats such as aquatic pollution, decline of freshwater species, loss of coral reef communities, human health concerns, changes in fish migration, increases in erosion, nutrient balance changes, increases in turbidity, and loss of submerged vegetation .…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation of direct biodiesel production from castor seed using waste resource as economical catalyst

Moradi

Ghanadi

2019

Env Prog and Sustain Energy

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The aim of present study is to evaluate the feasibility of using Soxhlet extractor to produce biodiesel from castor seed in one step. At first, oil extraction was conducted by using methanol and acetone as solvents. The results indicated that with methanol to acetone volume ratio 2:1 in a time of 6 h and oil bath temperature of 75°C, maximum oil extraction yield was achieved. Then the parameters, which had effect on direct biodiesel production of castor seed, were investigated through experimental design. Demineralized water plant sedimentation as an economic catalyst for direct biodiesel production was applied. The findings of statistical analysis showed that all of the parameters had a significant effect on fatty acid methyl ester yield. The optimum conditions that obtained from second‐order model were catalyst concentration of 5.81 wt % and solvent to seed weight ratio 4.53:1 in methanol to acetone volume ratio 2:1, reaction temperature 75°C, and reaction time of 8 h. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13146, 2019

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Oceans at Risk!

Cited by 9 publications

References 5 publications

Terrestrial cultural landscapes changed inshore marine ecosystems: Eight centuries of shellfish harvesting from the Kawela Mound site, Hawaiian Islands

Terrestrial cultural landscapes changed inshore marine ecosystems: Eight centuries of shellfish harvesting from the Kawela Mound site, Hawaiian Islands

Assessment of Heavy Metal Pollution Associated with Surface Sediment Contamination in the Bhima River, Karnataka, India

An experimental investigation of direct biodiesel production from castor seed using waste resource as economical catalyst

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