Biodiversity and Environmental Threats

Author(s):  
Christer Brönmark ◽  
Lars-Anders Hansson

The last chapter of Lakes and Ponds deals with how human activities affect the natural ecosystems and their function through eutrophication, contamination, acidification, brownification and increases in UV radiation, and how such anthropogenic disturbances may affect biodiversity and the ability of organisms to utilize a specific habitat. In addition, the chapter addresses novel environmental threats, such as global climate change and effects from our everyday chemicals, such as contraceptives, nanoparticles and antidepressant drugs. However, also possibilities and signs of improvement are discussed, providing hope for coming generations.

2001 ◽  
Vol 43 (4) ◽  
pp. 85-91 ◽  
Author(s):  
W. D. Williams

The global hydrological and salt cycles are described, as are the ways in which human activities have led to their disturbance. One effect of this disturbance is the unnatural increase in the salinity of many inland waters (secondary salinization). The geographical extent of secondary salinization is outlined, together with its effects on various types of inland waters, such as salt lakes, freshwater lakes and wetlands, and rivers and streams. The likely impact on salinization of global climate change is summarized.


2020 ◽  
Author(s):  
Stuart Lane

<p>The Anthropocene is widely described as producing a rupture in the global stratigraphic signature, attributable to human activities. There is no doubt that human activities have introduced new products into the stratigraphic record; and that humans are modifying the geomorphic processes that produce the sediment which then becomes incorporated into that record. The stratigraphic literature is replete with simplistic generalisations of how sediment flux to the continental shelf is changing, such as increasing due to soil erosion or decreasing due to hydropower related sediment flux disconnection. Here we argue that human impacts on geomorphic processes in the Anthropocene are unlikely to be stationary for long enough for them to be seen consistently across the depositional record of many different environments. Illustrating this for a major inner-Alpine drainage basin, the Swiss Rhône, we show that human-driven global climate-change is indeed dramatically altering the geomorphic process regimes of Alpine environments. However, there are three broad reasons why this is unlikely to be seen in the future geological record. First, the geomorphic response that drives increased sediment delivery is transient because of the significant regime changes associated with global climate change impacts. Second, such increases are countered by other human impacts, notably those on sediment flux, which are tending to reduce the connectivity of sediment sources to downstream sediment sinks. Third, human impacts on both sediment sources and connectivity are nonstationary, driven by both exogenous factors (here illustrated by the worldwide economic shock of 2008) and endogenous ones, notably human response to the perceived problems caused by both sediment starvation and sediment over-supply. In geomorphic terms, then, there is a difference between the pervasive nature of Earth system shifts that we see in the pre-Holocene depositional record and the more ephemeral impacts of the Earth system – human coupling associated with the Anthropocene. The extent to which this is the case is likely to vary geographically and temporally as a function of the degree and nature of human impacts on geomorphic processes. Thus, the primary challenge for future prediction will be as much the prediction of the complex and reflexive nature of human response as it will be geomorphic processes themselves.</p>


2011 ◽  
Vol 243-249 ◽  
pp. 5289-5292
Author(s):  
Jun Hua Yu

As known to all, the emission of greenhouse gases is mainly caused by human activities. If we could cut down the emission, we could gradually prevent the influence of climate change. Relevant research shows that in the field of energy consumption, the control of CO2 emission is the most effective way to save energy. Thus, reducing the architectural energy consumption is one of the most crucial factors to realize global climate goals. Although more and more scholars prefer to use the word ‘dilemma’ to describe the urgent contradiction between architectural construction and environment, and energy as well, I still want to discuss the influence of global warming on the architecture industry, and explain why it is an opportunity as well.


2012 ◽  
Vol 616-618 ◽  
pp. 1490-1495
Author(s):  
Juan Juan Hu ◽  
Yu Long He ◽  
Li Li Li

Climate change is a world-wide problem. The paper analyzed the global climate change characteristics, and put forward that the most important reason in recent years is human activities through many analysis. Then introduced the international negotiations of climate change and summarizes the international experiences that china can learn from.


Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1263
Author(s):  
Martin Beer ◽  
Radim Rybár

Global climate change is putting humanity under pressure, which in many areas poses an unprecedented threat to society as we know it. In an effort to mitigate its effects, it is necessary to reduce the overall production of greenhouse gases and thus, dependence on fossil fuels in all areas of human activities. The presented paper deals with an evaluation of energy mix of the Slovak Republic and four selected neighboring countries in the context of achieving their carbon neutral or carbon negative future. The development of the evaluated energy mixes as well as greenhouse gas emissions is presented from a long-term perspective, which makes it possible to evaluate and compare mutual trends and approaches to emission-free energy sectors.


2020 ◽  
Author(s):  
Vytautas Pilipavicius ◽  
◽  
Jan Zukovskis ◽  

The second half of the 20th century brought to light the consequences of human activity, when Humanity was confronted with demiurgical complexes and realized that the planet Earth was not only nature, but a complex system that today could no longer be operated by traditional methods and logic. While until the middle of the 20th century man used natural resources only to meet his needs, the 21st century poses new challenges for mankind to manage the consequences of human activities and to use them rationally and sustainably. The paper presents a study aimed at assessing the potential of ecosystem services development in the Nemunas Delta and anticipating their development directions. As a result of the research, the possible development directions of the Elderships were presented. It was done in two scenarios. The research was carried out in six municipality subdivisions (elderships) of the Nemunas Delta area in the framework of the Lithuanian Science Council project ‘Interaction of ecosystem services and human activities in the context of climate change’. Preparation of this paper was supported by funding from European Social Fund (project No 09.3.3-LMT-K-712-01-0178) under the grant agreement with the Research Council of Lithuania (LMTLT).


1991 ◽  
pp. 123-149
Author(s):  
Daniel B. Botkin ◽  
Robert A. Nisbet ◽  
Susan Bicknell ◽  
Charles Woodhouse ◽  
Barbara Bentley ◽  
...  

2012 ◽  
Vol 2 (3) ◽  
pp. 594-600
Author(s):  
M. Sciortino

This review paper is based on the Fourth Assessment Report (AR4) of the Intergovernmental Panel on Climate Change, in particular on the Working Group I (WG I) ‘The physical science basis’ and on the WG II ‘Impacts adaptation and vulnerability’ reports. The WG I report represents the state of the current scientific understanding of the observed and projected climate changes. The natural and anthropogenic drivers of climate change are addressed, focusing on the physical science understanding of observed records and on model-generated global climate change scenarios. The WG II report concerns the relationship between the observed changes of climate variables and the changes in the natural and human environment, addressing key policy-relevant scientific findings. Projected impacts and findings about vulnerability and adaptation on fresh water, natural ecosystems, food, fiber, coastal areas industry and health are also addressed for all continents. Scientific findings subsequent to the publication of the AR4 are not included in this review paper, whereas the recent decisions by the European Union (EU) and the agreements adopted within the United Nation Framework Convention on Climate Change based on the AR4 are reported.


Sign in / Sign up

Export Citation Format

Share Document