scholarly journals Impact of the construction of the harbor at pecém (Ceará, Brazil) upon reef fish communities in tide pools

2009 ◽  
Vol 52 (1) ◽  
pp. 187-195 ◽  
Author(s):  
Marcelo Carneiro de Freitas ◽  
Regine Helena Silva dos Fernandes Vieira ◽  
Maria Elisabeth de Araújo
Keyword(s):  
Water Quality ◽  
Species Diversity ◽  
Reef Fish ◽  
Human Activities ◽  
Sea Water ◽  
Fish Communities ◽  
Faecal Coliforms ◽  
Visual Census ◽  
The Impact ◽  
Microbiological Analyses

This study aimed to assess the impact of harbor construction at Pecém (Brazil) upon the reef fish communities in tide pools. The monitoring was carried out through a visual census and sea water quality was evaluated by microbiological analyses. From March to December 2001, 1,425 individuals of 17 families and 25 species were registered. The most frequent species were Haemulon parra, Acanthurus chirurgus, Abudefduf saxatilis and Sparisoma axillare. The average species diversity for the whole period was 1.77 bits.ind -1. There was evidence that the tide pools gradually silted up, resulting in a reduction in species diversity and richness. The microbiological analyses indicated the presence of faecal coliforms in the water though not at significant levels. The present study could be useful as an early reference for future projects, using the fish communities as indicators for the impact upon the environment of the harbor construction and other human activities.

Quantifying the impact of human activities on water quality based on spatialization of social data: a case study of the Pingzhai Reservoir Basin

2020 ◽  
Vol 20 (2) ◽  
pp. 688-699 ◽  
Author(s):  
Yongrong Zhang ◽  
Zhongfa Zhou ◽  
Haotian Zhang ◽  
Yusheng Dan
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Human Activities ◽  
Water Environment ◽  
Oxygen Demand ◽  
Pollution Source ◽  
Pollution Load ◽  
Social Data ◽  
Reservoir Basin ◽  
The Impact

Abstract In water pollution source research, it is difficult to quantify the impact of human activities on water quality. Based on pollution load theory and the concept of spatialization of social data, this study integrates land-use type, slope gradient, and spatial position, and uses the contribution of human activities to quantify the impact of farmland fertilizers, livestock and poultry wastes, and human domestic pollution on water quality in the study area. The results show that livestock manure is the largest source of total phosphorus (TP) and total nitrogen (TN) discharges in the research area, and domestic pollution is the largest source of chemical oxygen demand (COD) discharges. The total equal standard pollution load (as well as the load of each pollution source and its pollutant amount) is the highest in the Nayong River Basin and the lowest in the Baishui River Basin. The contributions of human activities to TP and TN have similar spatial distributions. The impact of human activities on COD discharge is minimal. The quantitative results of this model are basically consistent with the actual conditions in the Pingzhai Reservoir Basin, which suggests that the model reasonably reflects the impact of human activities on the water environment of the basin.

scholarly journals Dampak Pemutihan Karang Keras pada Komunitas Ikan Karang dan Makrozoobenthos di Wilayah Perairan Tejakula, Buleleng, Bali

Rekayasa ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 24
Author(s):  
Elok Faiqoh ◽  
I Wayan Gede Astawa Karang ◽  
Dwi Budi Wiyanto
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Bleaching ◽  
Fish Community ◽  
Global Climate ◽  
Population Decline ◽  
Fish Communities ◽  
Bleached Coral ◽  
Check Method ◽  
The Impact

<p>ABSTRAK<br />Pemutihan karang merupakan salah satu dampak dari perubahan iklim global, kenaikan suhu tersebut memberikan dampak negatif bagi keseimbangan ekosistem terumbu karang. ­Terumbu karang yang memutih dan kehilangan zooxanthella nya akan rentan terkena infeksi dan penyakit. Populasi komunitas ikan karang pemakan hewan karang dan makrozoobenthos juga akan menurun. Tujuan dari penelitian ini adalah untuk mengetahui besar dampak kerusa­kan terumbu karang dan dampaknya bagi populasi ikan dan makrozoobenthos. Survey dilakukan pada 3 titik di wilayah perairan Tejakula dengan metode reefcheck. Hasil penelitian menunjukkan kematian terumbu karang sebesar 5-7.5%, jumlah alga yang menutupi 3.125%. Kondisi ikan kepe-kepe yang merupakan pemakan hewan karang juga sudah ditemukan dalam jumlah cukup banyak. Keberadaan ikan herbivora dan makrozoobenthos herbivore membantu mengurangi jumlah alga yang menutupi. Sedangkan keberadaan ikan pemakan terumbu karang dan ikan predator memperlihatkan bahwa sistem ekologi yang ada di terumbu karang tersebut hampir kembali normal. <br />Kata Kunci: terumbu karang, komunitas ikan karang, makrozoobenthos.</p><p><strong>The Impact of Hard Coral Bleaching in Coral and Macrozoobenthos Fish Communities in Tejakula, Buleleng, Bali Water Areas</strong></p><p>ABSTRACT<br />Coral bleaching is one of the consequences of global climate change, as the rise of temperature negatively impacts the ecological balance of reef ecosystems. Bleached coral reefs lose their zooxanthellae, increasing vulnerability to infection and disease and consequently, causing population decline of macrozoobenthos and reef fish communities which prey on coral-consuming organisms. This research aims to determine the degree of coral reef damage and its impact on fish and macrozoobenthos population. The survey was conducted on 3 stations in Tejakula waters with the reef check method. Results show that coral reef death reaches 5-7.5%, with algal coverage of 3.125%. Kepe-kepe fish which prey on coral-consuming animals were also found in relatively high abundance. The presence of herbivore fish and macrozoobenthos help reduce algal cover. Meanwhile, the presence of coral-consuming and predator fish indicate that the coral reef ecological system has mostly returned to normal. <br />Keywords: coral reef, reef fish community, macrozoobenthos</p>

scholarly journals Fire and water: contaminants and clearance following uncontrolled fires

2021 ◽  
Author(s):  
Erin Walsh ◽  
Tim Stevenson ◽  
Richard Terrett ◽  
Cathy Banwell ◽  
Stewart Sutherland ◽  
...  
Keyword(s):  
Water Quality ◽  
Species Diversity ◽  
Human Health ◽  
Suspended Particle ◽  
Comprehensive Overview ◽  
Fire Event ◽  
Water Contaminants ◽  
Wide Range ◽  
Polycyclic Aromatic ◽  
The Impact

There is a growing body of evidence surrounding the implications of uncontrolled bushfires and wildfires on water. This topic has importance from an ecological perspective, and significance for human health as it has consequences for drinking water quality and supply. Against the backdrop of climate change, it is especially important to holistically understand the impact of fire on water. This review took a systematic approach to establish a comprehensive overview of the changes occurring in freshwater systems following uncontrolled wildfires and bushfires. Screening of 16,551 results obtained from Web of Science, PubMed, and MEDLINE resulted in 111 manuscripts suitable for inclusion. The impact of fire across a wide range of water quality indicators either relative to pre-fire measurements or reference sites was examined qualitatively (increase/decrease) and where possible quantitatively (% change or difference). Factors included biomass, indicator species and species diversity, metals, nutrients, salts, polycyclic aromatic hydrocarbons, particulates and turbidity, pH, conductivity, temperature, and water course morphology. Evidence focused largely on short to medium term impacts (e.g. within 2 years of the fire event), with only a subset of studies reporting on longer term changes in response to fire. We found that bushfire has acute and long-lasting effects on water in terms of physical (e.g. decreased suspended particle size), chemical (e.g. increased nutrient concentration), and biological (e.g. decreased species diversity) characteristics. There was also evidence of resilience and recovery. We urge future work to consider measures that will fulfil both environmental and human health considerations, to allow more integrated insight into the impacts of fire on water.

Agronomic and health aspects of storage ponds located on a golf course irrigated with reclaimed wastewater in Tunisia

2000 ◽  
Vol 42 (10-11) ◽  
pp. 399-406
Author(s):  
A. Bahri ◽  
C. Basset ◽  
A. Jrad-Fantar
Keyword(s):  
Water Quality ◽  
Golf Course ◽  
Golf Courses ◽  
Who Guidelines ◽  
Faecal Coliforms ◽  
Reclaimed Wastewater ◽  
Agronomic Quality ◽  
One Year ◽  
The Impact

In Tunisia, golf courses are irrigated with reclaimed wastewater stored in ponds for variable periods. The impact of storage on the sanitary and agronomic quality of the water was evaluated in two surveys conducted over one year. The water quality of the golf course ponds, operated as open ponds, was directly dependent on the flowrate and the quality of the new effluents. The faecal coliforms removal varied between 4 log. units at the end of winter and 1 log. unit in summer. Values exceeding the WHO guidelines (1989) (200 FC/100 mL) were recorded in the irrigation water. Reclaimed wastewater stored 20 days up to 8 months in two experimental closed ponds was in compliance with WHO guidelines throughout the year, i.e. 1000 FC/100 mL after a residence time of 5 to 10 days and 200 FC/100 mL after 40 days. A substantial loss of the water fertilizing potential was noticed after long storage. Storage increases the volume of water available for the dry season, and allows wider uses and unrestricted irrigation.A sequential use of the golf course ponds, with alternating closing and opening phases, would improve the water quality.

scholarly journals Trichomycete prevalence in Thomas Brook, Nova Scotia, exposed to different levels of human activity

Botany ◽  
2021 ◽  
pp. 671-682
Author(s):  
D.B. Strongman
Keyword(s):  
Water Quality ◽  
Nova Scotia ◽  
Human Activities ◽  
Aquatic Invertebrates ◽  
Management Practices ◽  
Beneficial Management Practices ◽  
Two New Species ◽  
Annapolis Valley ◽  
The Impact ◽  
Different Levels

The Thomas Brook in the Annapolis Valley, Nova Scotia, was the focus of an Agriculture and Agri-Food Canada wastershed evaluation of beneficial management practices (WEBs) project from 2004–2008. The stream is impacted by human activities along its course, with residential influences and farming operations. The water quality in Thomas Brook was assessed in 2006, and the current study done in 2011–2012 used the same standard invertebrate metrics to measure water quality. This project also examined the prevalence of gut endosymbionts (trichomycetes) in aquatic invertebrates to determine whether water quality affects this community of obligate microorganisms in their hosts. The water quality was improved in Thomas Brook in 2011/2012 compared with that measured in the earlier study. There were 34 taxa of trichomycetes recorded in benthic insects in the stream, including two new species. The trichomycete community was rich in dipteran hosts (midges and black fly larvae), but the prevalence of gut fungi in ephemeropteran (mayfly) nymphs in the system was low, perhaps due to the impact of human activities on water quality.

scholarly journals KARAKTERISTIK HABITAT MANGROVE DI SEKITAR PERTAMBANGAN TIMAH LEPAS PANTAI KABUPATEN BANGKA SELATAN (Characteristic Of Mangrove Habitat Around Tin Offshore Mining in South Bangka Regency)

2017 ◽  
Vol 24 (3) ◽  
pp. 131
Author(s):  
Ricca Affressia ◽  
Erny Poedjirahajoe ◽  
Soewarno Hasanbahri
Keyword(s):  
Water Quality ◽  
Heavy Metal ◽  
Species Diversity ◽  
Dissolved Oxygen ◽  
Sea Water ◽  
Systematic Sampling ◽  
Mangrove Habitat ◽  
Mangrove Area ◽  
Sample Test ◽  
Offshore Mining

AbstrakKegiatan penambangan timah lepas pantai di Kabupaten Bangka Selatan dapat mengganggu komponen biotik mangrove terkait kualitas air meliputi suhu, kekeruhan, salinitas, oksigen terlarut, pH, kedalaman lumpur, kandungan logam berat dari air laut dan komponen abiotik mangrove seperti vegetasi mangrove dan Plankton. Tujuan penelitian ini adalah untuk mengetahui karakteristik habitat mangrove berdasarkan kualitas perairan, vegetasi mangrove serta kandungan logam pada wilayah mangrove tanpa aktivitas pertambangan timah dan mangrove dengan aktivitas pertambangan timah. Metode pengambilan sampel di lapangan dilakukan secara systemactic sampling with random start, kemudian dianalisis dengan analisis independent sample test. Pengujian kualitas perairan dan kandungan logam dilakukan dengan mengacu pada baku mutu kebutuhan biota laut KepMenLH 2004. Hasil penelitian ini menunjukkan ada beda nyata rata-rata ketebalan lumpur pada kawasan mangrove alami 64 dan 179 cm pada kawasan mangrove di wilayah pertambangan timah lepas pantai, salinitas 32,56  dan 11,79  ‰, derajat keasaman (pH) 7,3 dan 6,2, oksigen terlarut 15,14 dan 12,82 ppm, kekeruhan 32 dan 9 cm, kelimpahan plankton 435.273 dan 546.800 individu/mL dengan keanekaragaman plankton 4,08 dan 2,99. Kerapatan jenis mangrove alami yaitu 46.600 individud/ha dan kerapatan jenis di kawasan mangrove pertambangan timah lepas pantai sebesar 18.300 individud/ha dengan keanekaragaman jenis 0,74 dan 0,84 dan perbandingan Suhu  28,4 dan 28,7 oC berdasarkan analisis sample test tidak menunjukkan beda nyata. Kandungan logam Timbal (Pb) dan Cu (tembaga) memiliki nilai yang sama, yaitu Pb < 0,0161 mg/L dan Cu < 0,0069 mg/L. Kadar Pb dan Cu di kawasan mangrove alami dipengaruhi oleh kondisi kepulauan merupakan jalur transportasi kapal-kapal yang menggunakan bahan bakar, sedangkan pada wilayah pertambangan timah di pengaruhi oleh limbah buangan hasil penambangan timah.Abstract Tin offshore mining in South Bangka Regency activity can disturb biotic component of mangrove related to water quality such as temperature, turbidity, salinity, dissolved oxygen pH, the depth of mud, the content of heavy metal of sea and mangrove abiotic component such as mangrove vegetation and plankton. The purpose of this study was to find the characteristic of mangrove habitat based on water quality, vegetation, and the content of heavy metal in the mangrove area with and without tin mining activities. The method of sample this research was done in systematic sampling with random start, and then was analyzed by using independent sample test. The quality of water and the content of heavy metal was analyzed referred to sea water quality standards for heavy marine life KepMenLH 2004. The research showed, there were obvious different of the mud thickness average value at the natural mangrove 64 and 179 cm of mangrove area in tin mining offshore. Salinity 32.56  and 11.79 ‰, degree acidity (pH) 7.3 and 6.2, dissolved oxygen 15.14 and 12.82 ppm, turbidity 32 and 9 cm, plankton 435,273 and 54,800 individual/mL which species diversity 4.08 and 2.99. Species density of offshore mining in mangrove area is 18,330 individual/ha and the natural mangrove 46,600 individual/ha which species diversity 0.74 and 0.84 and comparison of temperature 28.4 and 28.7oC of independent sample test can’t show different real. The content of lead metal (Pb) and Cu (copper) having the same value, Pb <0.0161 mg/L and Cu <0.0069 mg/L. Levels Pb and cu in the natural mangrove was influenced by the island was the transportation ships using fuel, while in the tin mining areas were influenced by the waste disposal of tin mining.

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