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61.
Agroecosystem energy transitions: exploring the energy-land nexus in the course of industrialization
Regional Environmental Change - 相似文献
62.
Ferrazzo Suéllen Tonatto Tímbola Rafael de Souza Bragagnolo Lucimara Prestes Elvis Korf Eduardo Pavan Prietto Pedro Domingos Marques Ulsen Carina 《Environmental science and pollution research international》2020,27(30):37718-37732
Environmental Science and Pollution Research - Exposure of geomaterials to acidic leachates may compromise their structure and functionality due to changes in physicochemical, mineralogical, and... 相似文献
63.
Thais Cristina de Oliveira Souza Rafael Coll Delgado Iris Cristiane Magistrali Gilsonley Lopes dos Santos Daniel Costa de Carvalho Paulo Eduardo Teodoro Carlos Antônio da Silva Júnior Rodrigo Hotzz Caúla 《Environmental monitoring and assessment》2018,190(11):688
This study aimed to analyze the spectral trend of vegetation with rainfall in El Niño-Southern Oscillation events (ENSO) in the Atlantic Forest, Brazil. Monthly rainfall data were collected from 85 conventional meteorological stations (EMC), data from the Enhanced Vegetation Index 2 (EVI2) and ENSO events (El Niño, La Niña, and Neutral) in the period from 2001 to 2013. Afterwards, state cluster analysis was performed using the results of non-parametric tests. The Mann-Kendall (MK) non-parametric test did not identify a trend pattern in rainfall distribution in the Atlantic Forest. The results for EVI2 by state and region showed that the trend is decreasing in the Northeast Region, except for the states of Alagoas and Pernambuco. Southeast region showed an increasing trend of EVI2 (except for Rio de Janeiro and São Paulo), while the South region showed a decreasing trend. In the Midwest, the trend was significantly decreasing. In the prognosis elaborated for the future, the regions with significant declines of the vegetation were the Northeast and Midwest. This study shows that the Atlantic Forest in some regions of Brazil has been suffering from the growing urbanization process and there is a trend of soil degradation. 相似文献
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65.
Thomas M. Lewinsohn José Luiz Attayde Carlos Roberto Fonseca Gislene Ganade Leonardo Ré Jorge Johannes Kollmann Gerhard E. Overbeck Paulo Inácio Prado Valério D. Pillar Daniela Popp Pedro L. B. da Rocha Wesley Rodrigues Silva Annette Spiekermann Wolfgang W. Weisser 《Ambio》2015,44(2):154-162
Ecological science contributes to solving a broad range of environmental problems. However, lack of ecological literacy in practice often limits application of this knowledge. In this paper, we highlight a critical but often overlooked demand on ecological literacy: to enable professionals of various careers to apply scientific knowledge when faced with environmental problems. Current university courses on ecology often fail to persuade students that ecological science provides important tools for environmental problem solving. We propose problem-based learning to improve the understanding of ecological science and its usefulness for real-world environmental issues that professionals in careers as diverse as engineering, public health, architecture, social sciences, or management will address. Courses should set clear learning objectives for cognitive skills they expect students to acquire. Thus, professionals in different fields will be enabled to improve environmental decision-making processes and to participate effectively in multidisciplinary work groups charged with tackling environmental issues. 相似文献
66.
67.
Netto GC Sauer T José HJ Moreira Rde F Humeres E 《Journal of the Air & Waste Management Association (1995)》2004,54(1):77-82
The evaluation of photonic efficiency in heterogeneous photocatalysis remains elusive because the number of absorbed photons is difficult to assess experimentally. The photonic efficiency of heterogeneous photocatalytic reactors depends on the reactor geometry, irradiation source, and photocatalyst properties. In this work, the relative photonic efficiency of heterogeneous photocatalytic reactors to degrade an azo dye was evaluated using phenol as the standard system. The experimental tests were carried out in a batch reactor under different conditions of pH, catalyst dosage, initial concentration, and ultraviolet (UV) lamps. The kinetics of disappearance of both phenol and azo dye were studied using the initial rate method and were described according to the Langmuir-Hinshelwood (L-H) kinetic model. It was observed that the relative photonic efficiency depends on the adsorption/desorption properties of the photocatalyst. 相似文献
68.
69.
Eduardo Soto-Galera Joel Paulo-Maya Eugenia López-López José Angel Serna-Hernández John Lyons 《Environmental management》1999,24(1):133-140
Chirostoma charari and C. compressum, and they are presumed extinct. Twelve (63%) of the remaining species had declines in distribution. Sixteen (80%) of the 20
localities sampled had lost species. The greatest declines occurred in Lago de Cuitzeo proper and in the lower portion of
the Río Grande de Morelia watershed. Species losses from the lake were attributable to drying and hypereutrophication of the
lake because of substantial reductions in the amount and quality of tributary inputs, whereas losses from the Río Grande de
Morelia watershed were the result of pollution from agricultural, municipal, and industrial sources, especially in the region
around the city of Morelia. Three localities in the upper portion of the Río Grande de Morelia watershed—Cointzio reservoir,
La Mintzita spring, and Insurgente Morelos stream—contained most of the remaining fish species diversity in the basin and
deserve additional protection. Fish faunal changes indicated major declines in the health of aquatic ecosystems in the Morelia–Cuitzeo
basin. 相似文献
70.
Effects of paternal care on reproductive success in the polygynous spotless starling Sturnus unicolor 总被引:2,自引:0,他引:2
J. Moreno José P. Veiga Pedro J. Cordero Eduardo Mínguez 《Behavioral ecology and sociobiology》1999,47(1-2):47-53
For males of socially polygynous avian species like the spotless starling, there may exist a trade-off between investing in
paternal care and controlling several nests. To determine how the intensity of paternal care affects reproductive success
per brood sired or expressed as the total number of young raised in all nests controlled by the same male, it is necessary
to manipulate paternal care. Testosterone (T) has been shown to depress the tendency for males to care for their young, and
induces them to acquire more mates. The effects of paternal care on reproductive success were studied by treating certain
male starlings with exogenous T and others with the antiandrogen cyproterone acetate (CA), and comparing the parental behavior
of T- and CA-males throughout the breeding season with that of controls. CA-males fed their chicks more during the first week
after hatching than T-males, with controls feeding at intermediate rates, both on a per nest basis and as total effort for
all nests controlled by the same male. Paternal feeding rates during the first week of chick life had a significant positive
effect on the number of fledged young. The hormone treatment significantly affected the number of chicks raised per nest,
CA-males having a higher breeding success per nest than T-males, and controls showing intermediate levels of success. There
was no significant effect of treatment on total reproductive success attained by males throughout the season. In the polygonous
spotless starling, the intensity of paternal care of young affects reproductive success per nest positively but not on a seasonal
basis.
Received: 6 February 1999 / Received in revised form: 30 June 1999 / Accepted: 11 July 1999 相似文献