Phytophysiognomy in the east of the Marajó island (mouth of the Amazon River) from the perspective of geological history in the Late Quaternary

Amaral, Dário Dantas do; Rossetti, Dilce de Fátima; Gurgel, Ely Simone Cajueiro; Pereira, Jorge Luís Gavina

doi:10.1016/j.catena.2022.106711

Cited by 6 publications

(3 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A unique example of the interaction between geological and hydrological processes is the Anavilhanas Archipelago (number 37 in figure 1 and table 2 ), the largest freshwater archipelago in the world [ 88 ]. Similarly, the Marajó area is also affected by subsidence and faulting which shaped the geomorphology, creating different depositional environments and drainage patterns that in turn affected vegetation patterns [ 138 , 139 ].…”

Section: Geodiversity Components In the Amazon Drainage Basinmentioning

confidence: 99%

“…The floristic gradient, as a result of edaphic gradients, has also been shown to influence avian species composition [ 30 ]. Geology also affects species diversity due to tectonic processes, as tectonic subsidence and the formations of faults cause topographic gradients influencing vegetation diversity and distribution patterns [ 138 , 139 ]. Topography and hydrology also affect species richness and composition [ 188 ], and river type has also been shown to influence species richness, as forests along blackwater rivers (called igapó) generally contain a higher number of species and a different species composition compared to whitewater forests (called várzea) [ 189 ].…”

Section: Synthesis and Outlookmentioning

confidence: 99%

See 1 more Smart Citation

Geodiversity in the Amazon drainage basin

Alsbach,

Seijmonsbergen,

Hoorn

2024

Phil. Trans. R. Soc. A.

View full text Add to dashboard Cite

The Amazon is the largest drainage basin on Earth and contains a wide variety of abiotic landscape features. In spite of this, the geodiversity in this basin has not yet been objectively evaluated. We address this knowledge gap by combining a meta-analysis of an existing global geodiversity map and its components with a systematic literature review, to identify the key characteristics of geodiversity in the Amazon drainage basin (ADB). We also evaluate how these global geodiversity component maps, that are based on the geology, geomorphology, soils and hydrology, could be refined to better reflect geodiversity in the basin. Our review shows that geology—through lithological diversity and geological structures—and hydrology—through hydrological processes that influence geomorphology and soil diversity—are the main determinants of geodiversity. Based on these features, the ADB can be subdivided into three principal regions: (i) the Andean orogenic belt and western Amazon, (ii) the cratons and eastern Amazon, and (iii) the Solimões-Amazon river system. Additional methods to map geomorphological and hydrological diversity have been identified. Future research should focus on investigating the relationship between the geodiversity components and assess their relationship with biodiversity. Such knowledge can enhance conservation plans for the ADB. This article is part of the Theo Murphy meeting issue ‘Geodiversity for science and society’.

show abstract

Section: Geodiversity Components In the Amazon Drainage Basinmentioning

confidence: 99%

Section: Synthesis and Outlookmentioning

confidence: 99%

Geodiversity in the Amazon drainage basin

Alsbach,

Seijmonsbergen,

Hoorn

2024

Phil. Trans. R. Soc. A.

View full text Add to dashboard Cite

show abstract

“…Numerous researchers have studied the formation and sedimentary processes associated with transient fluvial islands (Zanoni et al, 2008;Wang and Xu, 2018;Zheng et al, 2019;Leli et al, 2020;Lou et al, 2022;do Amaral et al, 2023). Previous studies have examined various processes of fluvial islands, such as their migration and erosion, and found that these processes have an impact on banks, island bodies, and river channels (Promma et al, 2007;Wintenberger et al, 2015;Sudra et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Decadal evolution of fluvial islands and its controlling factors along the lower Yangtze River

Wu,

Fan,

Zhang

et al. 2024

Front. Environ. Sci.

View full text Add to dashboard Cite

Fluvial islands are vital from both morphological and ecological perspectives and consequently have been hotspots of morphodynamic research in large rivers around the world. This study selected 14 representative fluvial islands in the lower reaches of the Yangtze River and explored their spatial-temporal evolution, including their shape and area dynamics during 1945–2016, by interpreting remote sensing images and analyzing the hydrological data. Results indicated that the total area of the 14 fluvial islands showed a growing trend at an average rate of 0.30 km2 yr−1 during the 72 years. The island Fenghuangzhou experienced the largest change in area, while Xiaohuangzhou (XHZ) had the smallest change in area. Sediment discharge and flooding were assumed to be the primary natural factors controlling the island dynamics. Furthermore, dam construction and bank reinforcement also played a critical role in preventing shoreline collapse, improving channel conditions, and promoting the stability of fluvial islands. From 1976 to 2016, the maximum erosion occurred on the left XHZ, while the maximum accretion was found on the Qingjiezhou island. Almost the entire river section experienced an accretion process on the right bank, which was assumed to be caused by the construction of erosion control structures. Besides, the dynamics of the fluvial islands along the lower Yangtze River appears to follow the erosion processes of the river bank. Our findings can provide an important reference for sustainable utilization and management of fluvial islands.

show abstract