Latest Research on Floodplain Research: Sep – 2019

Biodiversity of floodplain river ecosystems: ecotones and connectivity1

A high level of spatio‐temporal heterogeneousness makes riverine floodplains among the foremost species‐rich environments known . stream dynamics from flooding play a serious role in maintaining a diversity of lentic, lotic and semi‐aquatic home ground varieties, every delineated  by a diversity of successional stages. Ecotones (transition zones between adjacent patches) and property (the strength of interactions across ecotones) area unit structural and useful parts that result from and contribute to the spatio‐temporal dynamics of riverine ecosystems. In plain rivers, ecotones and their connected patches area unit clothed  in hierarchic series across a variety of scales. At a rough scale of resolution, fringing floodplains area unit themselves complicated ecotones between watercourse channels and uplands. At finer scales, patches of assorted varieties and sizes type home ground and microhabitat diversity patterns. A broad spatio‐temporal perspective, together with patterns and processes across scales, is required so as to realize insight into riverine multifariousness. we have a tendency to propose a hierarchic framework for examining diversity patterns in plain rivers. [1]

Floodplain biogeomorphology

Floodplains are distinctive ecosystems due to their linear kind, the generally extreme dynamism of their geophysics and since they method giant fluxes of energy and materials from upstream areas. this text focuses on the importance of hydrological inputs to fields through 1) their influence on the arrangement of landforms and vegetation communities and 2) the connections between flooding regimes and therefore the regeneration and turnover time of floodplain vegetation. several researchers have incontestable  shut links between the arrangement of vegeta tion communities and substance landform varieties, elevation, soil characteristics, tolerance to flooding and convenience of soil wet. [2]

The serial discontinuity concept: Extending the model to floodplain rivers

The serial separation idea (SDC) was developed as a theoretical construct that views impoundments as major disruptions of longitudinal resource gradients on stream courses. consistent with the SDC, dams end in upstream–downstream shifts in organic phenomenon and abiotic patterns and processes; the direction and extent of the displacement depend upon the variable of interest and are a operate of dam position on the stream time. As originally developed, the SDC failed to contemplate interactions between the stream and its flood plain. The new perspective conferred herein is AN initial arrange to embrace the dynamics of sediment flood plain rivers into the model employing a 3 reach characterization: forced headwater reach, adorned  reach and rambling reach. The forced headwater reach has conditions kind of like those delineated  within the original SDC, however the adorned  and rambling reaches offer a perspective that wasn’t self-addressed within the model. [3]

Wood properties of Carapa guianensis from floodplain and upland forests in Eastern Amazonia, Brazil

The variable environmental conditions of the Amazon forest will have an effect on the wood properties of the tree species distributed across its numerous phytophysiognomies. Carapa guianensis (Andiroba) happens in upland and plain forests, and also the wood and oil of its seeds have multiple uses. The aim of this study was to judge the wood properties of C. guianensis trees in upland and body of water plain forests of the Amazon. Eight trees were designated, with four being from the upland and 4 from the plain forests. The fiber length, fiber wall thickness, vessel diameter and frequency, microfibril angle, relative density and wood shrinkage were evaluated. The juvenile and mature wood zones were determined in step with these variables. [4]

Changes of Soil Fertility Status in Some Soil Series of Tista Floodplain Soils of Bangladesh, during 1996-2016

The study of many soil series of Tista field soils were administered to search out the dynamical trend of nutrients standing from 1996 to 2016. The studied values of various soil quality variables were modified likewise pH five.87 ± 0.47 to 5.95 ± 0.33, organic matter one.37 ± 0.31% to 1.47 ± 0.41%, ,total N zero.49 ± 0.13 cmol/kg to zero.64 ± 0.07 cmol/kg , chemical element zero.10 ± 0.04 cmol/kg to three.19 ± 0.34 cmol/kg, K zero.31 ± 0.29 cmol/kg to two.93 ± 0.26 cmol/kg, sulfur 0.19 ± 0.05 cmol/kg to eight.66 ± 2.74 cmol/kg, iron 1.09 ± 0.46 cmol/kg to two.07 ± 0.99 cmol/kg, metal zero.10 ± 0.02 cmol/kg to zero.31 ± 0.30 cmol/kg, copper 0.03± 0.01 cmol/kg to zero.02 ± 0.01 cmol/kg, zinc 0.01 ± 4.8E-20 cmol/kg to zero.01 ± 0.01 cmol/kg in 1996 and 2016 severally. most variables modified over considerably at five-hitter (P < zero.05) level except pH, organic matter, total N and Copper content whose weren’t important at five-hitter (P < zero.05) level not even 100% (P < zero.10) level. The increasing trends of total N, chemical element, and Iron were completely correlative from 1996 to 2016 than different variables. The copper and metallic element content didn’t showing any effective amendment over these twenty years. the general nutrients were adequate except organic matter and total N content. But, the trends had positive direction of all nutrients thanks to application of organic and inorganic fertiliser that may be correlative with increasing concern concerning nutrients management thought among the farmer. [5]

Reference

[1] Ward, J.V., Tockner, K. and Schiemer, F., 1999. Biodiversity of floodplain river ecosystems: ecotones and connectivity1. River Research and Applications, 15(1‐3), (Web Link)

[2] Hughes, F.M., 1997. Floodplain biogeomorphology. Progress in physical geography, 21(4), (Web Link)

[3] Ward, J.V. and Stanford, J.A., 1995. The serial discontinuity concept: extending the model to floodplain rivers. Regulated Rivers: Research & Management, 10(2‐4), (Web Link)

[4] Wood properties of Carapa guianensis from floodplain and upland forests in Eastern Amazonia, Brazil
Anderson Vasconcelos Firmino, Graziela Baptista Vidaurre, José Tarcísio da Silva Oliveira, Marcelino Guedes, Maria Naruna Felix de Almeida, João Gabriel Missia da Silva, João Vicente de Figueiredo Latorraca & José Cola Zanuncio
Scientific Reportsvolume 9, Article number: 10641 (2019) (Web Link)

[5] Hassan, M., Abu Syeed Ahmed, A., Arafat Hassan, M., Nasrin, R., B. M. Sadique Rayhan, A., Musfiq-Us- Salehin, S. and Khaliur Rahman, M. (2017) “Changes of Soil Fertility Status in Some Soil Series of Tista Floodplain Soils of Bangladesh, during 1996-2016”, Asian Research Journal of Agriculture, 5(3), (Web Link)

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