scholarly journals Short-term vegetation change on rehabilitated peatland on Rietvlei Nature Reserve

Koedoe ◽  
2003 ◽  
Vol 46 (1) ◽  
Author(s):  
C.E. Venter ◽  
G.J. Bredenkamp ◽  
P-L. Grundlingh

Natural peatlands occur on the Rietvlei Nature Reserve. Before the Pretoria City Council acquired the land, these peatlands were mined by private land-owners. Ditches were constructed to drain the area for mining and the peatlands became desicrated. Later the area was proclaimed as a nature reserve and has since then been managed as such. Rehabilitation of the drained peatland on Rietvlei Nature Reserve first started in 2000 as a Working for Water project. The aim of the rehabilitation was to close the ditches and rewet the peatland, to enable possible revival of the peatland. A baseline vegetation survey was undertaken during the summer (March to April) of 2001 to determine the nature of the pioneer communities that established on the rehabilitated area. This survey was repeated during the summer (March to April) of 2002 to detect changes in the vegetation. The same sample plots were used on both occasions. The initial pioneer vegetation was mostly composed of weedy annuals.

2011 ◽  
Vol 29 (1-2) ◽  
pp. 10-12 ◽  
Author(s):  
T. N. Kaye ◽  
R. Schwindt ◽  
C. Menke

Author(s):  
Alexia Barrable ◽  
David Booth ◽  
Dylan Adams ◽  
Gary Beauchamp

Nature connection, which describes a positive relationship between humans and the rest of nature, has been recognised as a worthwhile goal of all education. Given its association with wellbeing, as well as the fact that it can predict ecological behaviours in children, there have been several calls for it to become central to environmental education, and an important tool in tackling climate change. Previous research has reported the success of short-term interventions in increasing nature connection in children, but to date no empirical studies have looked at how mindful engagement with nature can promote both nature connection and positive affect. This study took place in a nature reserve in Wales and included n = 74 children, aged 9–10, who took part in three mindful activities. Pre- and post- measures included nature connection and positive/negative affect. Analysis showed a significant small to medium effect of the activity on nature connection. Moreover, positive affect significantly increased post-activity, while negative affect showed a small decrease.


1998 ◽  
Vol 28 (3) ◽  
pp. 402-411 ◽  
Author(s):  
Veli-Matti Komulainen ◽  
Hannu Nykänen ◽  
Pertti J Martikainen ◽  
Jukka Laine

Methane (CH4) fluxes from fixed sample plots in a minerotrophic fen and an ombrotrophic bog in southern Finland were measured by using a static chamber technique 1 year before and 2 years after a rewetting treatment. Methane emissions rose with rising water table after rewetting from 0.1 to 2.1 g ·m-2 ·a-1 at the fen site and from 0.8 to 4.6 g ·m-2 ·a-1 at the bog site but remained at a lower level than emissions from similar pristine site types. At the fen site the emissions were related to the short-term succession of cottongrass (Eriophorum vaginatum L.). Emissions showed high spatial and temporal variation with high emission peaks at the bog site. Temporal fluctuation of the emissions during the measurement season (from the end of May to the end of September) was correlated with peat temperature, while the seasonal fluxes were dependent on the moisture conditions in different microsites.


1978 ◽  
Vol 54 (3) ◽  
pp. 140-146
Author(s):  
J. Harry G. Smith

Intensive forestry on Canada's West Coast has some impressive accomplishments but re-investments of timber capital must increase many times to meet future needs. Intensive forest management requires greatly increased inputs of labour, capital, and knowledge in order to enhance the amount and value of yields from an ultimately limited land base. Attractive incentives must be developed for private land owners and users of public forest lands to sustain current yields of wild stands, to avoid a falldown in harvest as surplus old growth values are liquidated, and to make up for withdrawals from the land base and complications of timber management.Since 1912-13 direct B.C. government forest revenues have exceeded expenditures to 1976 by $847 million. British Columbians and many other Canadians are therefore deeply in debt to the forests of British Columbia, and soon should re-invest past surpluses to help build a base for even greater returns in future.Past trends, the current situation, relation to other areas, costs, responses, sources of funds, multiple use implications, alternatives, research needs, and incentives, are discussed with special reference to the Vancouver Forest District.


2009 ◽  
Vol 57 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Linda Olsvig-Whittaker ◽  
Margareta Walczak ◽  
Amos Sabach ◽  
Eli Dror

2019 ◽  
Vol 11 (1) ◽  
pp. 337-354 ◽  
Author(s):  
Dominic P. Parker ◽  
Walter N. Thurman

We highlight the extraordinary growth in private conservation via land trusts and conservation easements and describe the problems arising from the interplay of public finance and private decisions. We offer a framework for understanding the popularity of easements and land trusts and for evaluating policy reforms aimed at improving their performance. The framework, grounded in institutional and organizational economics in the tradition of Ronald Coase, Oliver Williamson, and Yoram Barzel, focuses on the measurement and monitoring costs faced by public and private stakeholders under current and prospective policy arrangements. We illustrate how the framework can be applied to contemporary debates about the appropriate tax treatment of donated easements, requirements that they be held in perpetuity, and the extent to which government should regulate private land trusts.


2017 ◽  
Vol 191 ◽  
pp. 96-105 ◽  
Author(s):  
M.C. Gallagher ◽  
S.C. Culloty ◽  
J. Davenport ◽  
L. Harman ◽  
M.J. Jessopp ◽  
...  

Author(s):  
Salem M. Bin Qadhi ◽  
Saeed Y. Bashir ◽  
Taha O. Assaggaf

This paper presents an existing problem of drinking water pollution for a small project and one of the model projects of drinking water in Yemen, designed to save and preserve good quality water for the present and future generations in the area. The paper gives the details of the project and explains the problem of bacteriological pollution and the steps undertaken to solve the problem. Some of the results for short-term solutions and recommendation for the long-term solutions are also given. 


Koedoe ◽  
2013 ◽  
Vol 55 (1) ◽  
Author(s):  
René Fourie ◽  
Charles R. Haddad ◽  
Anna S. Dippenaar-Schoeman ◽  
Anel Grobler

As part of the South African National Survey of Arachnida in the Grassland Biome, foliage-dwelling and grass-dwelling spiders (Arachnida: Araneae) were collected in the Erfenis Dam Nature Reserve in the central Free State Province from November 2005 to August 2007. Foliage-dwelling spiders were collected from three common tree or shrub species (Acacia karroo, Searsia ciliata and Searsia lancea) and grass-dwellers from four contrasting grasslands (uniform Themeda triandra, mixed, weedy and woodland grasslands). From the grass layer, 1649 spiders were collected, representing 15 families and 82 species, whilst 496 tree-dwelling spiders were collected that represented 17 families and 52 species. There was some overlap in the fauna of the two strata, resulting in a total of 108 species from 18 families being collected. The Araneidae, Philodromidae, Salticidae and Thomisidae were consistently the most abundant in all grassland types and tree species, although Salticidae were scarce on A. karroo. Assemblage analysis indicates high similarity and overlap in the fauna of the four grassland types, suggesting that the structural complexity of grasslands has a limited effect on species composition. In contrast, the foliage-dwelling assemblages were more distinct, with only some overlap between the faunas of S. ciliata and A. karroo, suggesting a stronger vegetation structural effect in shaping arboreal spider assemblages. The isolation of trees and shrubs within the extensive grassy habitat may contribute to the more unique fauna and lower species richness of the woody vegetation. Conservation implications: This study uncovered a rich diversity of plant-dwelling spiders from central South Africa. Grassland faunas show considerable temporal variation and some variability in microhabitat preferences, and sampling protocols should take this into account when spiders are considered in management plans and biodiversity surveys in reserves and private land.


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