Carbon And Water Cycles Amazon River Basin

Exam board: AQA, Edexcel, OCR, WJEC/Eduqas Level: A-level Subject: Geography First teaching: September 2016 First exams: Summer 2017 (AS); Summer 2018 (A-level) Master the in-depth knowledge and higher-level skills that A-level Geography students need to succeed; this focused topic book extends learning far beyond your course textbooks. Blending detailed content and case studies with questions, exemplars and guidance, this book: - Significantly improves students' knowledge and understanding of A-level content and concepts, providing more coverage of The Water and Carbon Cycles than your existing resources - Strengthens students' analytical and interpretative skills through questions that involve a range of geographical data sources, with guidance on how to approach each task - Demonstrates how to evaluate issues, with a dedicated section in every chapter that shows how to think geographically, consider relevant evidence and structure a balanced essay - Equips students with everything they need to excel, from additional case studies and definitions of key terminology, to suggestions for further research and fieldwork ideas for the Independent Investigation - Helps students check, apply and consolidate their learning, using end-of-chapter refresher questions and discussion points, plus tailored advice for the AQA, Edexcel, OCR and WJEC/Eduqas specifications - Offers trusted and reliable content, written by a team of highly experienced senior examiners and reviewed by academics with unparalleled knowledge of the latest geographical theories

The Amazon basin is a key component of the global carbon cycle. Not only is the old-growth rainforests in the basin huge carbon storage with about 120 billion metric tons of carbon in their biomass, but they also process annually twice the rate of global anthropogenic fossil fuel emissions through respiration and photosynthesis. In addition, the basin is the largest global repository of biodiversity and produces about 20 percent of the world s flow of fresh water into the oceans. Despite the large CO2 efflux from recent deforestation, the Amazon rainforest is still considered to be a net carbon sink or reservoir because vegetation growth on average exceeds mortality. However, current climate trends and human-induced deforestation may be transforming forest structure and behavior. Amazon forest dieback would be a massive event, affecting all life-forms that rely on this diverse ecosystem, including humans, and producing ramifications for the entire planet. Clearly, with changes at a global scale at stake, there is a need to better understand the risk, and dynamics of Amazon dieback. Therefore, the purpose of the book is to assist in understanding the risk, process and dynamics of potential Amazon dieback and its implications.

The book describes the carefully made measurements in the pasture and rainforest at a series of sites across Amazonia. The data are analysed and interpreted to allow them to be used as the basis of accurate and realistic description of the land surface in the global circulation model which are used to predict the climate effect of large scale deforestation. Results are presented at all scales: for the centimetre scale of leaf and soil moisture measurementes, the field scale of micrometeorological flux measurements, through to the scale of meteorological models which predict the climate of the whole Amazonian basin.

Igapó forests are a common part of the Amazon whose ecosystems are critical to our shared human future. The introduction addresses the structure, function and dynamics of igapó forests in the Amazon basin, focusing on their uniqueness due to their high level of complexity defined as the many ways that different components of igapó forests in the Amazon basin ecosystem interact and also on how those interactions are on a higher-order compared to other tropical forests. The text then breaks down the igapó ecosystem using these sections: (1) Igapó forests over space and time, (2) Water, light and soils, (3) The carbon cycle, (4) Litter, fungi and invertebrates, (5) Vertebrates, (6) Plant population studies, (7) Plant community studies, and (8) Human impacts and management. Experts from around the world serve as chapter authors that review what is known about their specific part of the igapó ecosystem, what research they have done, and also what needs to be done in the future.

Aquatic microorganisms are tidily related to the carbon cycle in aquatic systems, especially in respect to its accumulation and emission to atmosphere. In one hand, the autotrophs are responsible for the carbon input to the ecosystems and trophic chain. On the other hand, the heterotrophs traditionally play a role in the carbon mineralization and, since microbial loop theory, may play a role to carbon flow through the organisms. However, it is not yet clear how the heterotrophs contribute to carbon retention and emission especially from tropical aquatic ecosystems. Most of the studies evaluating the role of microbes to carbon cycle in inland waters were performed in high latitudes and only a few studies in the tropical area. In the prospective of global changes where the warm tropical lakes and rivers become even warmer, it is important to understand how microorganisms behave and interact with carbon cycle in the Earth region with highest temperature and light availability. This research topic documented microbial responses to natural latitudinal gradients, spatial within and between ecosystems gradients, temporal approaches and temperature and nutrient manipulations in the water and in the sediment.