Dinâmica de ocupação espacial de áreas contíguas (período 1987-2008) e sua relação com tensores de origem antrópica no manguezal do Rio Cachoeira, Ilhéus, Bahia

Martins, Patrick Thomaz de Aquino; Wanderley, Lilian de Lins

doi:10.1590/s1982-45132009000200006

Cited by 5 publications

(2 citation statements)

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“…The basin of the Cachoeira River empties into the Bay of Pontal, Ilhéus, State of Bahia. The mangroves of this estuary cover an area of approximately 248 ha (Martins, 2008), and are subject to accelerated eutrophication, mainly due to human activities (Souza, 2005; Santos, 2007; Silva, 2007). The tropical climate, Köppen Af, is always hot and humid, with no dry season.…”

Section: Methodsmentioning

confidence: 99%

Benthic macrofauna associated with decomposition of leaves in a mangrove forest in Ilhéus, State of Bahia, Brazil

et al. 2011

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We identified and quantified the benthic macrofauna associated with decomposing leaves of Rhizophora mangle and Laguncularia racemosa, to observe the differences in the abundance and composition of macrofauna between these mangrove species, and to examine whether the abundance and composition of organisms changed with different stations and collection times. Benthic macrofauna, mainly polychaetes and amphipods, were recorded from the fifth day after the installation of the experiment. Annelids including Oligochaeta and Polychaeta were the most numerous group. Crustacea were represented by peracarids (Amphipoda and Tanaidacea) and decapods. Of Hexapoda, only juvenile forms and pupae were present. The most abundant polychaete species was Perinereis brevicirrata, followed by Capitella cf. capitata, Heteromastus filiformis and Neanthes succinea. In one-way analysis of variance (ANOVA) there were no statistical differences between the macrofauna of mangrove species, seasons, or collection times, except among collection times for R. mangle litter bags. Two-way ANOVA showed homogeneity for macrofauna abundance between the groups of collection times for both mangrove species. The richness was similar for R. mangle litter bags, and showed a significant difference for L. racemosa. Abundance and richness were also similar between the mangrove species. The colonization of detritus by benthic invertebrates followed a successional sequence during the decomposition process. This suggests that the density of these organisms and their foraging behaviour affected the decomposition rates of leaves of R. mangle and L. racemosa.

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Section: Methodsmentioning

confidence: 99%

Benthic macrofauna associated with decomposition of leaves in a mangrove forest in Ilhéus, State of Bahia, Brazil

et al. 2011

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“…The understanding the urban growth pattern and the resulting forms of impact represents important information in the decision making processes regarding environmental planning (MARTINS and WANDERLEY, 2009). That spontaneous growth of urban areas and their polluting activities, in addition to environmental and climatic changes, directly affect the conservation status of coastal environments.…”

Section: Introductionmentioning

confidence: 99%

Assessment of conflicts between mangroves and human occupation in Subaé river outfall between the years 1988 to 2017

Silva

Cardoso

et al. 2022

Int J Innov Educ Res

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Coastal zones fulfill important ecological, social and economic functions. Because soil flooded by tidal variations and due to great variation in salinity. Mangroves cover these regions. They are also a tropical coastal ecological system, always in the lowlands, at the mouths of rivers and estuaries. Despite their important environmental role, mangrove areas have been continuously decreasing worldwide, with an average reduction of 30% in the last 30 years. Thus, this research sought to determine land use and land cover change in low Subaé. With emphasis on Mangrove areas and urban occupation. We used supervised classifications of satellite images to evaluate the changes. We chose images from 1988, 2003, and 2017. And used images from the Landsat series (30m) and an image from the PlanetScope satellite (3m). We validated classifications through the Tau and Geographical Simultaneity concordance measures. We observed that performing the spatio-temporal analysis observing only the variation of areas may not represent the phenomena that occurred. The overall Tau index calculation for the ratings was 0.89. During the period 1988-2017 there was a significant reduction in Agricultural areas, corresponding to around 15% of the study area. Meanwhile, growth of pasture from 24km² to 48Km² and the Urban Zone, occurred over all classes, including mangroves.

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Determination and Evaluation of Metallothionein and Metals in Mugil cephalus (Mullet) from Pontal Bay, Brazil

Pacheco

Silva

Hauser‐Davis

et al. 2016

Bull Environ Contam Toxicol

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To assess environmental contamination, studies have been increasingly carried out using biomarkers to diagnose the effects of toxic metal exposure, such as metallothionein (MT). In this context, the aims of the present study were to determine Cd, Cu, Ni and Pb concentrations, by ICP-MS, in liver samples from Mugil cephalus from the municipality of Ilhéus, located in North-Southeastern Brazil, in the state of Bahia, which has been increasingly suffering from anthropogenic pressure, and to quantify total MT in liver and gills. Among essential metals, copper (199.2 μg g) presented concentrations approximately 7 times higher than allowed by the World Health Organization (30 μg g). Liver samples showed higher concentrations than gills. Metallothionein concentrations indicate differential contamination along the study area. The first sampling showed higher induction of MT synthesis overall. Differences between liver and gill MT concentration trends were relatively minor, which may indicate the adequacy of analyzing gills in an environmental monitoring context.

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Dinâmica de ocupação espacial de áreas contíguas (período 1987-2008) e sua relação com tensores de origem antrópica no manguezal do Rio Cachoeira, Ilhéus, Bahia

Cited by 5 publications

References 1 publication

Benthic macrofauna associated with decomposition of leaves in a mangrove forest in Ilhéus, State of Bahia, Brazil

Benthic macrofauna associated with decomposition of leaves in a mangrove forest in Ilhéus, State of Bahia, Brazil

Assessment of conflicts between mangroves and human occupation in Subaé river outfall between the years 1988 to 2017

Determination and Evaluation of Metallothionein and Metals in Mugil cephalus (Mullet) from Pontal Bay, Brazil

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