scholarly journals Distribution and Demographics of Fuchsia Excorticata, Nelson Lakes National Park

2021 ◽  
Author(s):  
◽  
Edward Rex Lancelot Bartholomew

<p>The small tree Fuchsia excorticata (Onagraceae) is found on disturbed riparian sites throughout New Zealand. Spatial distribution and  demographic changes in populations of F. excorticata were surveyed in the Rotoiti Nature Recovery Project (RNRP) area, and an associated non-treatment reference area, Nelson Lakes National Park, over the period 2005 to 2007. The RNRP is an intensively managed "mainland island" project in mixed beech (Nothofagus) forest, pest animal species especially possums (Trichosurus vulpecula), rodents, and mustelids are controlled. The aim of this study was to survey the condition of F. excorticata in the managed and reference areas to determine if any differences could be detected between the populations over time. The only significant (p<0.05) difference between the two areas was in sapling abundance, which was higher in the RNRP management area. This was tentatively attributed to pest management; however the concurrence of complex  environmental influences, and a lack of management replication, prevented a simple interpretation of the data. There was no significant difference in recruitment, growth, mortality, and tree or seedling abundance  between the managed and reference areas. Growth rate, especially of saplings, was significantly greater at lower elevations in the RNRP managed area, however the inverse held for the reference area. Mammalian herbivory was light; the main affect being to restrict seedling growth through hedging. Periodic heavy flooding was responsible for much of the mortality, however many newly disturbed sites were rapidly populated with fuchsia seedlings. The need for rigour in establishing ecologically comparable reference sites for comparative studies was evident. There were inherent difficulties in establishing causal relationships between ecological changes and management practices where management was not replicated geographically.</p>

2021 ◽  
Author(s):  
◽  
Edward Rex Lancelot Bartholomew

<p>The small tree Fuchsia excorticata (Onagraceae) is found on disturbed riparian sites throughout New Zealand. Spatial distribution and  demographic changes in populations of F. excorticata were surveyed in the Rotoiti Nature Recovery Project (RNRP) area, and an associated non-treatment reference area, Nelson Lakes National Park, over the period 2005 to 2007. The RNRP is an intensively managed "mainland island" project in mixed beech (Nothofagus) forest, pest animal species especially possums (Trichosurus vulpecula), rodents, and mustelids are controlled. The aim of this study was to survey the condition of F. excorticata in the managed and reference areas to determine if any differences could be detected between the populations over time. The only significant (p<0.05) difference between the two areas was in sapling abundance, which was higher in the RNRP management area. This was tentatively attributed to pest management; however the concurrence of complex  environmental influences, and a lack of management replication, prevented a simple interpretation of the data. There was no significant difference in recruitment, growth, mortality, and tree or seedling abundance  between the managed and reference areas. Growth rate, especially of saplings, was significantly greater at lower elevations in the RNRP managed area, however the inverse held for the reference area. Mammalian herbivory was light; the main affect being to restrict seedling growth through hedging. Periodic heavy flooding was responsible for much of the mortality, however many newly disturbed sites were rapidly populated with fuchsia seedlings. The need for rigour in establishing ecologically comparable reference sites for comparative studies was evident. There were inherent difficulties in establishing causal relationships between ecological changes and management practices where management was not replicated geographically.</p>


2002 ◽  
Vol 8 (3) ◽  
pp. 218
Author(s):  
Blair Hardman

ULURU-Kata Tjuta National Park (UKTNP) is World Heritage listed for both its cultural landscape and biological values, as well as being a Biosphere Reserve. However, introduced predators and competitors, and a reduction in traditional Aboriginal land management practices have had a significant impact on much of the original fauna. A cross-cultural workshop was held in September 1999 to discuss the re-introduction of native animal species to the National Park. Presentations were given by specialist scientists, involving their programmes from arid and semi-arid environments in South Australia, Northern Territory and Western Australia. In addition, presentations were held by the local Aboriginal people, the Anangu, who expressed many of their concerns and reservations relating to the reintroduction project. This book details the material presented, and although the workshop transpired three years ago, the information is still relevant to reintroductions occurring today.


2003 ◽  
Vol 21 (4) ◽  
pp. 302-306 ◽  
Author(s):  
C. S. Fowler ◽  
P. Esteves ◽  
G. Goad ◽  
B. Helmer ◽  
K. Watterson

2017 ◽  
Vol 4 (03) ◽  
Author(s):  
SAMBORLANG K. WANNIANG ◽  
A. K. SINGH

A field experiment was conducted during kharif 2011 on experimental farm of the College of Post Graduate Studies (CAU–Imphal), Umiam (Meghalaya) to evaluate the effect of integration of green manuring, FYM and fertilizers as integrated nutrient management (INM) practices on growth and developmental behaviour of quality protein maize cultivar QPM 1. The data revealed that comparatively higher amount of primary nutrients were added in green manured maize plots in comparison to non green manured treatments. Green manuring also left a positive response on plant height, CGR, RGR leaf area, and dry matter accumulation in plants though the difference between green manured and non-green manured treatments was at par. Treatments 75 % RDF + 5 t FYM ha-1, 50 % RDF + 7.5 t FYM ha-1, 100 % RDF ha-1 and 75 % RDF + 2.5 t FYM ha-1 recorded significantly higher values of all the above said growth parameters over 50 % RDF + 5 t FYM ha-1 and control treatments. At all stages of observations, the maximum dry matter was associated with RDF (recommended doses of fertilizers) which was at par with 75 % RDF + 5 t FYM ha-1, but significantly higher over the plant dry weight recorded from all remaining treatments. A Significant difference in CGR at 30 – 60 and 60 – 90 DAS stage and in RGR at 90 DAS - harvest stage was observed due to various combinations of recommended dose of fertilizer with different doses of FYM. Number of days taken to attain the stages of 50% tasselling, silking and maturity did not differ significantly due to green manuring. However, treatment 75 % RDF + 5 t FYM ha-1 took significantly lesser number of days for these stages than other treatment combinations. The superiority of the treatment 75 % RDF + 5 t FYM ha-1 indicated a possibility of substituting 25% of RDF with 5 t FYM ha-1 without any loss in dry matter accumulation in plants of the quality protein hybrid maize in mid-hill ecosystems of Meghalaya.


2021 ◽  
Vol 13 (11) ◽  
pp. 6478
Author(s):  
Amemarlita Matos ◽  
Laura Barraza ◽  
Isabel Ruiz-Mallén

This study is based on ethnographic research that analyzes how traditional knowledge and local beliefs on biodiversity conservation relates to the local ability to adapt and be resilient to climatic changes in two communities around Gorongosa National Park, Mozambique: Nhanfisse in the buffer zone and Muanandimae in the core area. A total of 78 semi-structured interviews with heads of households were conducted. We found that both communities carried out practices and held beliefs associated with conservation, such as protecting trees and animal species considered sacred or perceived as beneficial for human life in terms of water provision and agricultural production. In addition to traditional ceremonies that respond to extreme climatic events such as drought and flood, other adaptation strategies used by the communities include moving to neighboring areas in search of better living conditions and using forest products in times of scarcity. We discuss that the management of the park should be agreed on, in a shared way, between local communities and conservation agents to ensure that these areas continue to perform the ecological, subsistence, and spiritual functions required. Our research results contribute to a better understanding of local adaptation dynamics towards extreme climatic events and improvement of management strategies.


2021 ◽  
Vol 13 (14) ◽  
pp. 8006
Author(s):  
Till Schmäing ◽  
Norbert Grotjohann

The Wadden Sea ecosystem is unique in many respects from a biological perspective. This is one reason why it is protected by national parks in Germany and by its designation as a UNESCO World Heritage Site. In biology didactics, there are only a few studies that focus on the Wadden Sea. This work investigates students’ word associations with the two stimulus words “national park” and “UNESCO World Heritage Site”. The survey was conducted among students living directly at the Wadden Sea and among students from the inland. The analysis of the identified associations (n = 8345) was carried out within the framework of a quantitative content analysis to be able to present and discuss the results on a group level. A statistically significant difference was found between the two groups. Overall, results showed that the students made subject-related associations as well as a large number of associations to both stimulus words that could be judged as non-subject-related. In some cases, a connection with the region of residence could be found, but this was not generally the case. Even students’ immediate residential proximity to the Wadden Sea is no guarantee that they have knowledge of the two considered protection terms.


2020 ◽  
Vol 13 (1) ◽  
pp. 208
Author(s):  
Celia De La Mora-Orozco ◽  
José G. Flores-Garnica ◽  
Lucia M. Vega-Ramírez ◽  
Irma J. González-Acuña ◽  
Juan Nápoles-Armenta ◽  
...  

The Agave tequilana Weber is an important commercial crop in the State of Jalisco, Mexico. However, the agave cultivation generates significant soil loss. For that reason, knowledge about the implementation of the agriculture management practices, such as manure application and the combination of inorganic fertilizers and manure, are relevant. The objective of this research was to determine the effect of agricultural management practices on the total organic carbon (TOC) in the soil in three study locations: Arandas, Tepatitlán, and Acatic in the Altos Sur region of Jalisco. A random sampling was carried out in each study location, 12 samples were obtained for each location at 0–30 cm deep, and a total of 36 samples were analyzed. The evaluated parameters were the potential hydrogen (pH), electrical conductivity (EC), bulk density (BD), soil-water saturation (SWS), total nitrogen (TN), and total organic carbon (TOC). Basic statistics and correlations between parameters were generated. In addition, to estimate TOC from a multivariate analysis, models were developed based on the lowest Akaike information criterion (AIC) and of the classification and regression trees (CART). ANOVA and Tukey test were determined. Results demonstrated a significant difference in the TOC percentages between the study locations. The Tukey test showed that there is no difference in TOC content between the Tepatitlán and Arandas sites, but there is a difference between these two sites and the Acatic. The latter resulted with the lowest values of TOC. Long-term studies are recommended to develop crop management strategies.


2004 ◽  
Vol 31 (6) ◽  
pp. 597 ◽  
Author(s):  
Peter R. Brown ◽  
Micah J. Davies ◽  
Grant R. Singleton ◽  
J. David Croft

The impacts of a range of farm-management practices on house mouse (Mus domesticus) populations were tested in a large replicated field study in a complex irrigated farming system in southern New South Wales, Australia. An advisory panel, made up of farmers, extension officers, industry representatives and scientists developed a series of best-practice farm-management actions to minimise the impact of mice. Twelve experimental sites were split into six treated sites, where farmers were encouraged to conduct the recommended practices, and six untreated sites, where farmers conducted their normal farming practices. Mouse abundance was generally low to moderate for the 4-year project (5–60% adjusted trap success). We found significant reductions in population abundance of mice on treated sites when densities were moderate, but no differences when densities were low. Biomass of weeds and grasses around the perimeter of crops were significantly lower on treated sites because of applications of herbicide sprays and grazing by sheep. We could not detect any significant difference in mouse damage to crops between treated and untreated sites; however, levels of damage were low (<5%). Yields of winter cereals and rice crops were significantly higher on treated sites by up to 40%. An analysis of benefits and costs of conducting farming practices on treated sites compared with untreated sites showed a 2 : 1 benefit to cost ratio for winter cereals, 9 : 1 for rice and 4 : 1 for soybeans.


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