Meny
 

Ecological Modelling of River-Wetland Systems

A Case Study for the Abras de Mantequilla Wetland in Ecuador

Around 6% of the Earth's land surface is covered by wetlands. Wetlands play a key role in hydrological and biogeochemical cycles, delivering multiple benefits to society: sources of water supply, flood regulation, water purification, agriculture, fisheries, and biodiversity. Les mer
Vår pris
1384,-

(Paperback) Fri frakt!
Leveringstid: Sendes innen 21 dager
På grunn av Brexit-tilpasninger og tiltak for å begrense covid-19 kan det dessverre oppstå forsinket levering.

Paperback
Legg i
Paperback
Legg i
Vår pris: 1384,-

(Paperback) Fri frakt!
Leveringstid: Sendes innen 21 dager
På grunn av Brexit-tilpasninger og tiltak for å begrense covid-19 kan det dessverre oppstå forsinket levering.

Om boka

Around 6% of the Earth's land surface is covered by wetlands. Wetlands play a key role in hydrological and biogeochemical cycles, delivering multiple benefits to society: sources of water supply, flood regulation, water purification, agriculture, fisheries, and biodiversity. Hence, wetland systems are of immense socio-economic as well as ecological importance. In this research, the focus was on the Abras de Mantequilla (AdM) wetland in the tropical coastal region of Ecuador, a RAMSAR site and case study area for the EU-FP7 WETwin project.





The research in this thesis involves a combination of field data collection, multivariate analysis techniques, as well as numerical modelling studies. The goal was to explore the effects of changes in hydrological forcing on the hydrodynamic and ecohydraulic responses of the wetland. The study aims to contribute to the understanding of how a tropical river-wetland system functions in terms of hydrodynamics, water quality, primary production, and biotic communities. Spatial patterns of biotic communities and environmental variables are obtained as well as spatio-temporal variability of hydrodynamics, water quality, primary productivity and fish habitat-suitability conditions.





In data scarce areas and countries with financial constraints, the combination of field measurements with numerical models was extremely useful and relevant, confirming that these techniques complement each other in obtaining a better understanding of the dynamics of freshwater river-wetland systems. Studies like the present research can be used to enhance awareness about the environmental services of wetlands and stimulate cooperation between all stakeholders in order to achieve more sustainable wetland management.

Fakta

Innholdsfortegnelse

1 INTRODUCTION
1.1 THE ROLE OF WETLANDS
1.2 WETLAND CONSERVATION
1.3 ECOSYSTEM SERVICES
1.4 WETLAND DYNAMICS, STRUCTURE AND FUNCTION
1.5 THE WETWIN PROJECT
1.6 THE ABRAS DE MANTEQUILLA WETLAND IN ECUADOR
1.7 CAPABILITIES OF MATHEMATICAL MODELLING TOOLS
1.8 OVERALL RESEARCH APPROACH
1.9 SPECIFIC RESEARCH QUESTIONS
1.10 THESIS OUTLINE


2 HYDRODYNAMICS OF THE TROPICAL ADM RIVER-WETLAND SYSTEM
2.1 GEOGRAPHICAL CONDITIONS
2.2 HYDROLOGICAL AND METEOROLOGICAL CONDITIONS
2.3 THE ADM RIVER-WETLAND SYSTEM
2.4 NATURAL VARIABILITY IN HYDRODYNAMIC CONDITIONS
2.5 WATER BALANCE AND RELATIVE CONTRIBUTIONS OF INFLOWS
2.6 CONDITIONS DURING MEASUREMENT CAMPAIGNS 2011&2012
2.7 DISCUSSION


3 ENVIRONMENTAL VARIABLES AND SPATIAL PATTERNS
3.1 BACKGROUND
3.2 FIELD MEASUREMENT CAMPAIGNS
3.3 SAMPLING RESULTS WITHIN THE WATER BODY
3.4 SAMPLING RESULTS OF BOTTOM SEDIMENT
3.5 CONCENTRATIONS, GRADIENTS AND KEY VARIABLES


4 COMMUNITY STRUCTURE OF BIOTIC ASSEMBLAGES
4.1 BACKGROUND
4.2 FIELD MEASUREMENT CAMPAIGNS
4.3 PHYTOPLANKTON
4.4 ZOOPLANKTON
4.5 MACROINVERTEBRATES
4.6 FISH
4.7 SUMMARY OF SIMILARITIES
4.8 SUMMARY OF DISSIMILARITIES
4.9 LINKING BIOTIC ASSEMBLAGES WITH ENVIRONMENTAL VARIABLES
4.10 DISCUSSIONS


5 EVALUATION OF WATER QUALITY AND PRIMARY PRODUCTION DYNAMICS
5.1 BACKGROUND AND SCOPE
5.2 MODEL SET UP
5.3 MODEL PERFORMANCE AND VERIFICATION
5.4 SCENARIOS
5.5 DISCUSSION


6 EVALUATION OF HABITAT SUITABILITY CONDITIONS FOR FISH
6.1 BACKGROUND AND SCOPE
6.2 STUDY AREA
6.3 THE HABITAT SUITABILITY INDEX
6.4 RESULTS
6.5 DISCUSSION


7 DISCUSSION AND SYNTHESIS
7.1 SUSTAINABILITY OF THE ADM WETLAND HYDRODYNAMICS
7.2 MASS BALANCES OF NUTRIENTS
7.3 MASS BALANCES OF PRIMARY PRODUCERS
7.4 NUTRIENT BALANCES AND THEIR VARIATIONS BETWEEN DIFFERENT HYDROLOGICAL CONDITIONS
7.5 WETLAND PRODUCTIVITY AND RELATED PROCESSES


8 CONCLUSIONS AND RECOMMENDATIONS
8.1 RESEARCH APPROACH
8.2 SPATIO-TEMPORAL VARIABILITY OF THE ADM WETLAND HYDRODYNAMICS
8.3 DOMINANT AND KEY SPECIES IN THE ADM WETLAND SYSTEM
8.4 SPATIAL PATTERNS IN THE DISTRIBUTION OF THE ENVIRONMENTAL VARIABLES AND BIOTIC COMMUNITIES
8.5 MAIN PHYSICO-CHEMICAL AND ECOLOGICAL PROCESSES
8.6 SPATIO-TEMPORAL V

Om forfatteren