The benthic macroinvertebrate community of the upper reaches of an Australian estuary that undergoes marked seasonal changes in hydrology

2001 ◽  
Vol 15 (13) ◽  
pp. 2481-2501 ◽  
Author(s):  
A. N. Kanandjembo ◽  
M. E. Platell ◽  
I. C. Potter
Keyword(s):  
Seasonal Changes ◽  
Macroinvertebrate Community ◽  
Benthic Macroinvertebrate ◽  
Australian Estuary

scholarly journals Benthic macroinvertebrates as bioindicators of environmental quality of Pará River estuary, a wetland of Eastern Amazon

2020 ◽  
Vol 56 (1) ◽  
pp. 111-127
Author(s):  
Álvaro José de Almeida Pinto ◽  
Vanessa Bandeira da Costa Tavares ◽  
Samara Cristina Campelo Pinheiro ◽  
Marcelo de Oliveira Lima ◽  
Daiane Aviz ◽  
...  
Keyword(s):  
Environmental Impact ◽  
Environmental Quality ◽  
Seasonal Changes ◽  
River Estuary ◽  
Coarse Sand ◽  
High Impact ◽  
Macroinvertebrate Community ◽  
Benthic Macroinvertebrate ◽  
Abundance And Diversity

The study characterized and evaluated the use of the benthic macroinvertebrate community as an indicator of impacts in different estuarine environments around the Industrial Port Complex (IPC) of Vila do Conde (Pará State, Amazon region). Fauna of beaches and rivers, in sectors of the estuary under different degrees of environmental impact (high, medium, and low), was compared in different seasonal periods. Macrofauna was composed of typically fresh-water and estuarine groups. Beaches presented sediment with a texture ranging from medium to coarse sand, with a less rich macrofauna ( = 4.5 ± SE 0.3 taxa/sample) and dense ( = 1,838.1 ± 164.8 ind./m2) of organisms when compared to rivers ( = 5.9 ± 0.3 taxa/sample, and 3,248.9 ± 77.0 ind./m2), which were environments more muddy. For both environments, sites in the high-impact sector were less rich ( = 4.7 ± 0.3 taxa/sample) and dense ( = 2,812.9 ± 232.7 ind./m2) when compared to those in the low-impact sector ( = 7.6 ± 0.4 taxa/sample, and 3,314.3 ± 230.1 ind./m2). Richness ( = 6.4 ± 0.3 taxa/sample) and density ( = 3,859.4 ± 190.2 ind./m2) were higher in the rainier season when compared to the less rainy season ( = 4.8 ± 0.3 taxa/sample, and 1,933.0 ± 172.1 ind./m2). However, there were no significant seasonal changes in composition. Results indicated that the structure of the benthic macroinvertebrate community surrounding the IPC responds to the loss of environmental quality, with extreme effects of a drop in abundance and diversity. Taxa that are more tolerant (Namalycastis caetensis, Cirolana sp., Pseudosphaeroma sp., Tubificidae, and Chironomidae) and sensitive (Hydropsychidae and Eteone sp.) to impact conditions were identified and evaluated as potential bioindicators.

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