scholarly journals Nitrogen cycles in terrestrial ecosystems: climate change impacts and mitigation

2016 ◽  
Vol 24 (2) ◽  
pp. 132-143 ◽  
Author(s):  
Zhenzhu Xu ◽  
Yanling Jiang ◽  
Guangsheng Zhou

The nitrogen (N) cycle and N balance have primarily been modified by anthropogenic activities and environmental changes at various scales, including biological individual, ecosystem, local landscape, continental region, and global. These modifications have drastically affected the structures and functions of natural and agricultural ecosystems in terrestrial and aquatic areas. In this manuscript, we first present a modified view of the global N cycle that includes N transport, conversion, and exchange processes. Second, several crucial issues concerning N balance, including N deposition and excessive addition and the dynamics of N and other nutrients, are reviewed. Third, the effects of climate change factors, including water status, warming, and elevated CO2 concentrations, on N balance and the N cycle and their interactions within and with other environmental factors are outlined. Finally, intervention strategies for improving N balance and N cycling to address rapid continual climatic change and socio-economic development are presented and discussed. It is highlighted that the altered N balance and N cycle between the geosphere, biosphere, and atmosphere have produced the profoundly critical challenge of maintaining N levels within an appropriate range, which should be considered by relevant people and sectors, including researchers, managers, and policy makers from ecological, environmental, and sustainable development sectors.

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Andrew D. Richardson ◽  
Koen Hufkens ◽  
Tom Milliman ◽  
Donald M. Aubrecht ◽  
Min Chen ◽  
...  

Abstract Vegetation phenology controls the seasonality of many ecosystem processes, as well as numerous biosphere-atmosphere feedbacks. Phenology is also highly sensitive to climate change and variability. Here we present a series of datasets, together consisting of almost 750 years of observations, characterizing vegetation phenology in diverse ecosystems across North America. Our data are derived from conventional, visible-wavelength, automated digital camera imagery collected through the PhenoCam network. For each archived image, we extracted RGB (red, green, blue) colour channel information, with means and other statistics calculated across a region-of-interest (ROI) delineating a specific vegetation type. From the high-frequency (typically, 30 min) imagery, we derived time series characterizing vegetation colour, including “canopy greenness”, processed to 1- and 3-day intervals. For ecosystems with one or more annual cycles of vegetation activity, we provide estimates, with uncertainties, for the start of the “greenness rising” and end of the “greenness falling” stages. The database can be used for phenological model validation and development, evaluation of satellite remote sensing data products, benchmarking earth system models, and studies of climate change impacts on terrestrial ecosystems.


Hypatia ◽  
2014 ◽  
Vol 29 (3) ◽  
pp. 599-616 ◽  
Author(s):  
Kyle Powys Whyte

Indigenous peoples must adapt to current and coming climate‐induced environmental changes like sea‐level rise, glacier retreat, and shifts in the ranges of important species. For some indigenous peoples, such changes can disrupt the continuance of the systems of responsibilities that their communities rely on self‐consciously for living lives closely connected to the earth. Within this domain of indigeneity, some indigenous women take seriously the responsibilities that they may perceive they have as members of their communities. For the indigenous women who have such outlooks, responsibilities that they assume in their communities expose them to harms stemming from climate change impacts and other environmental changes. Yet at the same time, their commitment to these responsibilities motivates them to take on leadership positions in efforts at climate change adaptation and mitigation. I show why, at least for some indigenous women, this is an important way of framing the climate change impacts that affect them. I then argue that there is an important implication in this conversation for how we understand the political responsibilities of nonindigenous parties for supporting distinctly indigenous efforts at climate change adaptation and mitigation.


2015 ◽  
Vol 9 (2) ◽  
pp. 6 ◽  
Author(s):  
Joshua Ostapchuk ◽  
Sherilee Harper ◽  
Ashlee Cunsolo Willox ◽  
Victoria L. Edge ◽  
Rigolet Inuit Community Government

<p>Climate changes are rapidly intensifying and can lead to adverse global health impacts. Indigenous populations are especially vulnerable to climate change because of their dependence on the environment for cultural activities and subsistence. The voices of Inuit Elders and seniors encompass deep wisdom and history; as such, the goal of this research was to examine the perceived impacts of climate and environmental changes on physical, mental, and emotional health, as observed by Elders and seniors in the Inuit community of Rigolet, Nunatsiavut, Labrador, Canada. A mixed-methods approach was used to gather data capturing these local observations, as well as perceived impacts on community health. A community survey was administered in November 2009 (n = 75) and in-depth interviews were conducted with Elders and seniors from January to October 2010 (n = 22). Survey results indicated that Elders and seniors observing changes in weather patterns, water systems, and wildlife were more likely to perceive climate change impacts on health (p &lt; 0.05). Emergent themes from the interviews included: recurring observations of climate change, including changes in temperature, ice, snow, and seasonal timing; impacts on physical health, including reduced physical activity levels and poorer nutrition; impacts on mental and emotional health, including feelings of isolation and depression; and an identified need for community-wide adaptation. This research emphasized the importance of understanding Elder-specific perspectives of climate-health relationships in the Canadian North to develop sustainable, culturally relevant adaptation strategies to mitigate health impacts related to climate change.<br /><br />ᓯᓚᐅᑉ  ᐊᓯᔾᔨᐸᓪᓕᐊᓂᖓ  ᓱᒃᑲᓕᔪᒃᑯᑦ  ᐱᕙᓪᓕᐊᕗᖅ  ᐊᒻᒪᓗ  ᓯᓚᕐᔪᐊᕐᒥ  ᐊᑦᑕᓇᖅᑐᒃᑯᑦ  ᐊᑦᑐᐃᔪᓐᓇᖅᑯᖅ  ᐃᓗᓯᓕᕆᓂᒃᑯᑎᒍᑦ.  ᓯᓚᕐᔪᐊᕐᒥ  ᓄᓇᖃᖅᑳᖅᑑᔪᑦ  ᐊᑦᑐᖅᑕᐅᓂᖅᐹᖑᔪᓐᓇᖅᑯᑦ  ᐊᕙᑎᒥᓂᒃ  ᑕᑎᖃᕐᓂᕐᒥᓄᑦ,  ᐱᖅᑯᓯᖏᑎᒍᑦ  ᐊᒻᒪᓗ  ᐱᓇᓱᐊᖅᐸᓐᓂᖏᑎᒍᑦ.  ᐃᓄᐃᑦ  ᐃᓐᓇᐃᑦ  ᐃᓐᓇᑐᖃᐃᓪᓗ  ᓂᐱᖏᑦ  ᓯᓚᑐᓂᕐᒥᒃ  ᑐᓐᖓᕕᖃᖅᑯᑦ  ᐊᒻᒪᓗ  ᐊᑐᖅᓯᒪᔭᖃᖅᑯᑦ;  ᓲᕐᓗ  ᐆᒧᖓ  ᖃᐅᔨᓴᕐᓂᕐᒧᑦ  ᑐᕌᒐᖃᖅᑎᓪᓗᒍ  ᓯᓚᐅᑉ  ᐊᓯᔾᔨᐸᓪᓕᐊᓂᖓᓂᒃ  ᐊᑦᑐᐃᔾᔪᑕᐅᔪᓂᒃ  ᐊᒻᒪᓗ  ᖃᓄᖅ  ᐊᕙᑎᐅᑉ  ᑕᐅᑦᑐᖓ,  ᐃᓱᒪᒃᑯᑦ  ᐊᒻᒪᓗ  ᐃᓗᓯᓕᕆᓂᒃᑯᑎᒍᑦ,  ᐃᓐᓇᐃᑦ  ᑕᑯᓐᓇᖅᑕᖃᖅᑯᑦ  ᐃᓄᐃᑦ  ᓄᓇᓕᖓᓂ  ᕆᒍᓚᑦ,  ᓄᓇᑦᓯᐊᕗᒻᒥ,  ᓛᐸᑐᐊᒥ,  ᑲᓇᑕᒥ.  ᑲᑎᑕᐹᓂᑦ  ᖃᐅᔨᓴᕐᓂᕐᒧᑦ  ᐊᖅᑯᑏᑦ  ᓄᓇᓕᒻᒥ  ᑕᑯᓐᓇᒐᐅᕗᑦ  ᐊᒻᒪᓗ  ᑕᑯᓐᓇᑕᒃᑯᑦ  ᓄᓇᓕᒻᒥ  ᐃᓗᓯᓕᕆᓂᒃᑯᑦ  ᐊᑦᑐᖅᑕᐅᓂᐅᔪᑦ.  ᓄᓇᓕᒻᒥ  ᐊᐱᖅᓲᑎ  ᓄᕕᐱᕆ  2009<strong>−</strong>ᒥ  ᐃᖏᕐᕋᓂᖃᔪᕗᖅ  (<em>n </em>= 75)  ᐊᒻᒪᓗ  ᐃᓗᑐᔪᓂᑦ  ᐊᐱᖅᓲᑎᖃᔪᕗᑦ  ᐃᓐᓇᕐᓄᑦ  ᐃᓄᑐᖃᕐᓄᓪᓗ  ᔮᓐᓄᐊᓕᒻᒥᑦ  ᐅᑐᐱᕆᒧᑦ  2010<strong>−</strong>ᒥ (<em>n </em>= 22). ᐊᐱᖅᓲᑎᒧᑦ  ᑭᒡᒍᓯᐅᔪᔪᑦ  ᓇᓗᓇᐃᖅᓯᔪᕗᑦ  ᐃᓄᑐᖃᐃᑦ  ᑕᑯᔭᖃᖅᓯᒪᓂᖏᓐᓂᒃ  ᓯᓚᐅᑉ  ᖃᓄᐃᓐᓂᖓᑕ  ᐊᓯᔾᔨᕐᓂᖏᓐᓂᑦ,  ᐃᒪᐅᓪᓗ  ᐊᒻᒪᓗ  ᐆᒪᔪᐃᑦ  ᑕᒪᒃᑯᐊ  ᐊᑦᑐᐃᔪᑦ  ᐃᓄᐃᑦ  ᐃᓗᓯᕆᔭᖏᓐᓂᒃ  (<em>p </em>&lt; 0.05).  ᓲᔪᕐᓇᑐᓪᓗ  ᐊᓚᒃᑲᔪᔪᑦ  ᐊᐱᖅᓲᑕᐅᔪᔪᓂᑦ  ᐃᓗᓕᖃᐅᕐᓂᖓᓄᑦ  ᒪᑯᓂᖓ:  ᓲᔪᕆᔭᐅᕙᑦᑐᑦ  ᓯᓚᐅᑉ  ᐊᓯᔾᔨᕐᓂᖓᓄᑦ;  ᓂᓪᓚᓱᓐᓂᕐᒧᑦ  ᐆᖅᑰᓇᕐᓂᒧᓪᓗ;  ᓂᓚᐅᑉ,  ᐊᐳᑎᐅᑉ  ᐊᒻᒪᓗ  ᐅᐱᕐᖔᑉ,  ᐅᑭᐅᑉ  ᐊᓰᓐᓇᓕᓂᖏᓐᓂᒃ; ᐊᑦᑐᐃᔾᔪᑕᐅᔪᓪᓗᑎ  ᑎᒥᒧᑦ   ᐃᓗᓯᓕᕆᓂᕐᒧᑦ;  ᐃᓱᒪᒧᑦ  ᐊᒻᒪᓗ  ᐃᓱᒪᒃᑯᑦ  ᐃᓗᓯᓕᕆᓂᕐᒨᖓᔪᑦ,  ᐃᓚᓕᐅᑦᑐᒋᑦ  ᐃᑉᐱᓐᓂᐊᔾᔪᑎᑦ  ᐃᓄᑑᓕᐅᑎᓂᕐᒧᑦ  ᐊᒻᒪᓗ  ᓄᒫᓱᓐᓂᒃᑯᑦ  ᐊᒻᒪᓗ;  ᑭᓐᖒᒪᑦᑎᓂᖅᓄᓇᓕᒻᒥ  ᐊᓯᔾᔨᐸᓪᓕᐊᓂᕐᒧᑦ  ᖃᓄᖅᑑᕈᑎᓂᒃ.  ᐅᓇ  ᖃᐅᔨᓴᕐᓂᖅ  ᓇᓗᓇᐃᖅᓯᓚᐅᖅᑯᖅ  ᐱᓪᓗᕆᑦᑐᓂᒃ  ᑐᑭᓯᐅᒪᔾᔪᑎᓂᒃ  ᐃᓐᓇᕐᓄᑦ  ᐃᓱᒪᒋᔾᔪᑕᐅᓯᒪᔪᓂᒃ  ᓯᓚᐅᑉ  ᐊᓯᔾᔨᐸᓪᓕᐊᓂᖓᓄᑦ  ᐃᓗᓯᓕᕆᓂᕐᒧᑦ  ᐊᑦᑐᐊᓂᖃᖅᑎᓪᓗᒋᑦ  ᑲᓇᑕᐅᑉ  ᐅᑭᐅᖅᑕᖅᑐᖓᓂ  ᑐᕌᒐᖃᕐᓂᐊᑎᓪᓗᒋᑦ  ᑲᔪᓯᐅᒪᔾᔪᑎᔅᓴᓂᒃ,  ᐱᖅᑯᓯᖅᑎᒍᑦ  ᐊᑲᕐᕆᔪᓂᒃ  ᐅᐸᓗᖓᐃᔭᕈᑎᓂᒃ  ᐊᑦᑐᖅᑕᐅᓂᑭᓐᓂᖅᓴᐅᖁᓪᓗᒋᑦ  ᐃᓗᓯᓕᕆᓂᒃᑯᑦ  ᐃᑉᐱᓐᓂᕈᑎᓂᒃ  ᓯᓚ  ᐊᓯᔾᔨᐸᓪᓕᐊᑎᓪᓗᒍ.</p>


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohit Arora ◽  
Sashikant Sahoo ◽  
Sarishty Sharma ◽  
Syed Shabih Hassan ◽  
Brijendra Pateria

Wetland plays a vital role in sustainable ecological development. They hold balanced environment conditions and filter the surface and sub-surface water and moderate the local weather condition. But now-a-days wetlands are shrinking quickly all over world due to climate change & anthropogenic activities and extinction of wetlands agitates the local environmental conditions with contexts to water and soil conditions. This study is mainly focused on climate change impacts on wetland ecosystems over Harike and Keshopur wetland in Punjab region, India. Harike wetland is one of largest wetland in northern part of India, which is designated as Ramsar site. The Landsat imageries and climate parameters (includes land surface temperature and rainfall) have been used to extract spatial and temporal information over wetlands during period from 2009 to 2020. Landsat data have been analysed in two phases: Pre-monsoon and Post-Monsoon. Wetland area has been classified into five different classes: agriculture, water, built-up, aquatic vegetation1, and aquatic vegetation2. These analyses showed that wetland area has been reduced over a period of ten years and much area has been converted in agricultural land and built-up. The intense anthropogenic activities have resulted more changes in the wetland over both regions. The present study specifies that wetland ecosystem monitoring is essential for policy makers for sustainable management and also concluded that the significant reduction of highly biodiversity wetland area is required to conserve.


Ecologies ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 313-331
Author(s):  
Haijiang Yang ◽  
Xiaohua Gou ◽  
Dingcai Yin

Climate change is having a significant impact on the global ecosystem and is likely to become increasingly important as this phenomenon intensifies. Numerous studies in climate change impacts on biodiversity, ecosystems, and ecosystem services in China have been published in recent decades. However, a comprehensive review of the topic is needed to provide an improved understanding of the history and driving mechanisms of environmental changes within the region. Here we review the evidence for changes in climate and the peer-reviewed literature that assesses climate change impacts on biodiversity, ecosystem, and ecosystem services at a China scale. Our main conclusions are as follows. (1) Most of the evidence shows that climate change (the increasing extreme events) is affecting the change of productivity, species interactions, and biological invasions, especially in the agro-pastoral transition zone and fragile ecological area in Northern China. (2) The individuals and populations respond to climate change through changes in behavior, functions, and geographic scope. (3) The impact of climate change on most types of services (provisioning, regulating, supporting, and cultural) in China is mainly negative and brings threats and challenges to human well-being and natural resource management, therefore, requiring costly societal adjustments. In general, although great progress has been made, the management strategies still need to be further improved. Integrating climate change into ecosystem services assessment and natural resource management is still a major challenge. Moving forward, it is necessary to evaluate and research the effectiveness of typical demonstration cases, which will contribute to better scientific management of natural resources in China and the world.


2019 ◽  
Vol 7 (8) ◽  
pp. 213 ◽  
Author(s):  
Yun Zhang ◽  
Juan Tao ◽  
Jun Wang ◽  
Liuyong Ding ◽  
Chengzhi Ding ◽  
...  

Diatoms are fundamental carbon sources in a wide range of aquatic food webs and have the potential for wide application in addressing environmental change. Understanding the evolution of topics in diatom research will provide a clear and needed guide to strengthen research on diatoms. However, such an overview remains unavailable. In this study, we used Latent Dirichlet Allocation (LDA), a generative model, to identify topics and determine their trends (i.e., cold and hot topics) by analyzing the abstracts of 19,000 publications from the Web of Science that were related to diatoms during 1991–2018. A total of 116 topics were identified from a Bayesian model selection. The hot topics (diversity, environmental indicator, climate change, land use, and water quality) that were identified by LDA indicated that diatoms are increasingly used as indicators to assess water quality and identify modern climate change impacts due to intensive anthropogenic activities. In terms of cold topics (growth rate, culture growth, cell life history, copepod feeding, grazing by microzooplankton, zooplankton predation, and primary productivity) and hot topics (spatial-temporal distribution, morphology, molecular identification, gene expression, and review), we determined that basic studies on diatoms have decreased and that studies tend to be more comprehensive. This study notes that future directions in diatom research will be closely associated with the application of diatoms in environmental management and climate change to cope with environmental challenges, and more comprehensive issues related to diatoms should be considered.


2019 ◽  
Vol 8 (7) ◽  
pp. 218 ◽  
Author(s):  
Tabe

It has been projected that the single greatest impact of environmental changes will be on human migration and displacement. Migration has been extensively discussed and documented as an adaptation strategy in response to environmental changes, and more recently, to climate change. However, forced relocation will lead to the displacement of people, and although much has been written about it, very little has been documented from the Pacific Islands perspective, especially by communities that were forced to relocate as a result of colonialism and those that have been forced to migrate today as a result of climate change impacts. Using the Gilbertese resettlement from the Phoenix Islands to the Solomon Islands, in particular, Wagina Island in the 1960s as a case study of forced relocation and displacement of Pacific Islands people during the colonial period, this paper aims to underline some of the important lessons that can be learned from this historical case to inform the present and future challenges of climate change migration and displacement. Without dismissing migration as a coping strategy, the paper argues that the forced relocation of people from their home islands as a result of climate change will lead to displacement. It accentuates that in the case of Pacific Islands, forced relocation will lead to displacement if they are forced to leave their land because of their deep relationship and attachment to it. The paper also emphasizes the need to acknowledge and honor Pacific Islands’ voices and perceptions in discourses on climate change migration and displacement at national, regional and international forums.


2020 ◽  
Vol 11 ◽  
Author(s):  
Sergio Jiménez ◽  
Masoud Fattahi ◽  
Khaoula Bedis ◽  
Shirin Nasrolahpour-moghadam ◽  
Juan José Irigoyen ◽  
...  

2014 ◽  
Vol 1 (2) ◽  
pp. 101-110
Author(s):  
Rizkita Alamanda

AbstrakPerubahan iklim bukan lagi menjadi sebuah omong kosong, kenyataan bahwa bumi semakin panas dan ancaman atas dampak perubahan iklim telah menjadi nyata. Pergeseran musim mengakibatkan kegagalan dalam bercocok tanam, kenaikan permukaan air laut mengancam keberadaan negara-negara kepulauan kecil. Banjir dan kekeringan adalah sebagian kecil dari dampak perubahan iklim yang telah nyata dirasakan. Bumi semakin panas, para ahli dalam Laporan IPCC WG I AR 5 semakin yakin bahwa penyebab perubahan iklim adalah akibat aktivitas manusia. Pertanyaan yang kemudian muncul adalah siapa yang bertanggung jawab atas kerusakan dan kerugian yang diderita akibat dampak perubahan iklim? Di Indonesia, Gugatan Warga Negara menjadi salah satu bentuk litigasi yang menjadi alternatif penyelesaian dampak perubahan iklim yang dirasakan oleh masyarakat. Abstract Climate change is not longer became an issue, we are facing the fact that earth is getting warmer and the impact of climate change is become real. The season changed, and affected the crops failure. The raising sea level threatening the existence of small islands. Flood and drought are simply the several impact of climate change that has been perceived. Earth is getting warmer, the IPCC Fifth Assessment Report of Working Group I ensure the main cause of climate change is from anthropogenic activities. The question that arose later is who will be responsible for any damage of the climate change impact? Citizen Law Suit in Indonesia has become one of litigation form that can be an alternative solution of climate change impacts in civil society.


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