scholarly journals Starea macrobentosului rîului Prut în anul 2020

2021 ◽  
Author(s):  
Oxana Munjiu ◽  
Keyword(s):  
Invasive Species ◽  
Rare Species ◽  
Anthropogenic Impact ◽  
Environmental Changes ◽  
Species Conservation ◽  
Points Of Interest ◽  
Potential Impact ◽  
Prut River

In this study the author presents data on the density, biomass and diversity of macrobenthos along the Prut River in 2020. There are data on groups more sensitive to environmental changes and anthropogenic impact, collection points of interest in terms of species conservation due to the presence of rare species, the potential impact of invasive species.

Land Planning, Agro-forest Systems, and Implications for Ecosystem Services: Insights from Northern Italy

2021 ◽  
Author(s):  
Antonio Tomao ◽  
Barbara Ermini ◽  
Marcela Prokopov ◽  
Adriano Conte
Keyword(s):  
Land Use ◽  
Environmental Changes ◽  
Land Use Changes ◽  
Value Added ◽  
Temporal Analysis ◽  
Land Use Land Cover ◽  
Development Patterns ◽  
The North ◽  
Multi Temporal ◽  
Potential Impact

Negative environmental changes generally addressed as ‘syndromes’ are evaluated in the context of Soil Degradation (SD) and interpreted by using a ‘Land-Use/Land Cover Changes’ (LULCCs) framework in order to disentangle ‘past trajectories’, ‘present patterns’, and ‘future changes’. This approach allows to discuss the potential impact on SD processes and it represents an informed basis for identifying measurable outcomes of SD. This study focuses on the case of Emilia Romagna, a region located in the North of Italy with high-value added agricultural productions. A multi-temporal analysis of land-use changes between 1954 and 2008 has been proposed, discussing the evolution of associated SD syndromes in Emilia Romagna. The contributing information have been used as a baseline for Sustainable Land Management (SLM) strategies. This framework of analysis provides useful tools to investigate and to monitor the effects of SD in the Mediterranean basin where several regions underwent common development patterns yelding global pathological symptoms of environmental degradation.

scholarly journals Cladocera of the Lençóis Maranhenses (NE - Brazil): faunal composition and a reappraisal of Sars' Method

2010 ◽  
Vol 70 (3 suppl) ◽  
pp. 755-779 ◽  
Author(s):  
K. Van Damme ◽  
HJ. Dumont
Keyword(s):  
Invasive Species ◽  
Species Composition ◽  
Rare Species ◽  
Simple Technique ◽  
Species Number ◽  
Acid System ◽  
Faunal Composition ◽  
Hit And Run ◽  
Total Species

We studied the Cladocera of a group of ephemeral interdunal pools in the Lençóis Maranhenses, Maranhão State (NE - Brazil) and recorded 34 species. The fauna was overwhelmingly neotropical, with no evidence of invasive species. Species composition differed in Lagoa da Colher, an acid system. We provide notes on behaviour, morphology and taxonomy of some lesser-known anomopods, with emphasis on the Chydoridae. We figure male Oxyurella longicaudis, Chydorus eurynotus, Disparalona leptorhyncha, Alonella dadayi and A. clathratula. We provide notes on the "Sars' Method", hatching of freshwater crustaceans from dry mud, a simple technique that complements the information of hit-and-run surveys. About half of the total species number (44%) was revived through this method; 18% of species were additional to field-collected samples. The Sars' method also yielded abundant specimens of rare species, useful for identification and studies on behaviour.

scholarly journals Leptochloa nealleyi (Nealley's sprangletop).

2020 ◽  
Author(s):  
Jose Chabert-Llompart
Keyword(s):  
Invasive Species ◽  
North America ◽  
Rare Species ◽  
Rice Production ◽  
Grass Weed

Abstract L. nealleyi is a grass weed which has been described as an invasive species in Cuba by Oviedo Prieto et al. (2012). However, in the Manual of Grasses of North America (Barkworth et al., 2007) it is regarded as a rare species in Cuba. Although not mentioned as an invasive species, Bergeron et al. (2015), report that L. nealleyi has expanded its habitat by becoming a worrisome weed in rice production in Louisiana and Texas, USA.

Industrial Development and the Conservation of Vascular Plants, with Special Reference to Britain

1984 ◽  
Vol 11 (3) ◽  
pp. 235-245 ◽  
Author(s):  
John G. Kelcey
Keyword(s):  
Rare Species ◽  
Industrial Development ◽  
Species Conservation ◽  
Industrial Process ◽  
Nutrient Status ◽  
Common Species ◽  
Wild Plants ◽  
Slope Aspect ◽  
Conservation Movement ◽  
The Creation

This paper, which has been nearly a decade in gestation, describes the contribution that industrial development makes to the conservation of wild plants in Britain. It challenges the priorities of the British conservation movement in concentrating its efforts on rare species and habitats, on the creation of Nature reserves, and on the maintenance of rare species as rare species. A more positive approach is now advocated, stressing the need to prevent common species from becoming rare, the creation of new habitats, and the propagation and reintroduction of uncommon species.Whilst species conservation is relatively easy to justify and comprehend, habitat conservation is considerably more difficult. ‘Industrial habitats’ may be defined as those derived from any industrial process (including transport routes). Such habitats are characterized by a complex association and interaction of slope, aspect, drainage, nutrient status, and the chemical and physical characteristics of the skeletal soils—all of which are apt to change markedly over very short distances. In addition they are generally open, lack stability, do not receive frequent applications of fertilizer and/or herbicide, and are often inaccessible or well protected.

The role of plant-plant facilitation in non-native plant invasions.

2020 ◽  
pp. 153-176
Author(s):  
Lohengrin A. Cavieres ◽  
◽  
Keyword(s):  
Invasive Species ◽  
Biological Invasions ◽  
Native Species ◽  
Environmental Changes ◽  
Third Party ◽  
Native Plant ◽  
Facilitative Effect ◽  
Native Plant Species ◽  
Negative Effect ◽  
Facilitative Interactions

Biological invasions are one the most important drivers of the current environmental changes generating important biodiversity losses. Although several hypotheses have been proposed to understand the mechanisms underpinning biological invasions, most of them relate to negative interactions among native and invasive species, where the capacity for many invasive species to reduce diversity is often attributed to a greater competitiveness. However, neighbouring species can also show facilitative interactions, where the presence of one species can facilitate another directly by improving environmental conditions or indirectly through negative effects on a third party species. This chapter reviews the scientific literature on plant invasion, seeking examples of where facilitative interactions either among native and non-native plant species or among non-native species were demonstrated. There are several examples of native species that directly facilitate a non-native species, while examples of native species having a negative effect either on a native or a non-native species that compete with a target non-native, generating a net indirect facilitative effect of the native on the target non-native, are less numerous. Direct facilitation among non-native species has been reported as part of the 'invasional meltdown' phenomenon (Chapter 8, this volume). There are cases where non-native species can have a negative effect on a native species that competes with a target non-native, generating a net indirect facilitative effect among the non-natives. Finally, a non-native species can have a direct facilitative effect on native species, which might have important implications in restoration.

Doctoral Social Work Education

2017 ◽  
Vol 28 (3) ◽  
pp. 224-233 ◽  
Author(s):  
Ram A. Cnaan ◽  
Toorjo Ghose
Keyword(s):  
Higher Education ◽  
Social Work ◽  
Open System ◽  
Social Work Education ◽  
Doctoral Education ◽  
Environmental Changes ◽  
Future Studies ◽  
Societal Changes ◽  
Potential Impact ◽  
Work Education

This article is intended to forecast major environmental changes that may impact social work doctoral education and assess what should be done in anticipation of these changes. We apply an open system and future studies perspective to guide our work. We present a set of predicted societal changes that will impact social work as a profession and doctoral education in particular. We then present and discuss major expected changes in higher education and further assess some of their potential impact on social work doctoral education. We conclude with a synthesis of how these pending changes may impact social work doctoral education and what can be done in anticipation of these changes.

Sign in / Sign up

Export Citation Format

Share Document