scholarly journals Analysis of the Correlation Between Ecological Status and Location Environment by Cultivated Land Restoration Type of Geumgang Riverine Ecobelt

2021 ◽  
Vol 24 (4) ◽  
pp. 389-401
Author(s):  
Soo-Dong Lee ◽  
Seung-Jun Back ◽  
Hyun-Kyung Kang
Keyword(s):  
Animal Ecology ◽  
Species Diversity ◽  
Native Species ◽  
Animal Species ◽  
Ecological Status ◽  
Plant Ecology ◽  
Paddy Fields ◽  
Cultivated Land ◽  
Artificial Wetland ◽  
Positive Effect

Background and objective: The purpose of this study is to investigate the ecological status of six areas around Geumgang River that used to be farmlands before they were restored as a riverine ecobelt. This study aims to analyze the correlation between the location environment and ecological status of the sites to identify the environmental factors affecting them. Methods: The sites are classified into four types according to restoration: terraced paddy fields, flat paddy fields, artificial wetland, and landscape forest. The survey items were divided into land use status, plant ecology, and animal ecology. Results: In terms of plant ecology, terraced paddy fields showed favorable naturality with the rate of native species above 90% and the naturalization index below 10%. In terms of animal ecology, the total number of species found in these areas was biggest in terraced paddy fields, followed by flat paddy fields, artificial wetland, and landscape forest. Regarding species diversity, terraced paddy fields also showed abundant species with an average of 1.05 to 1.09. The results of the correlation analysis showed that the forest area around the sites had the most significant effect on species diversity. The grassland and open water area showed a positive correlation with the total number of animal species and the number of dragonflies, confirming that the marshy grassland had a positive effect. As the cultivated land and urbanized area around the sites increased, it had a negative effect on the distribution of native species and the number of animal species that appeared, and a positive effect on the naturalization index. Conclusion: It is necessary to establish preemption and restoration plans for sites such as grasslands adjacent to the forest and terraced paddy fields in order to promote resilience of the diverse species returning to the purchased lands.

Rapid Assessment Of Taal Volcano Protected Landscape (TVPL) Terrestrial Biodiversity

2017 ◽  
Vol 11 (1) ◽  
Keyword(s):  
Animal Species ◽  
Rapid Assessment ◽  
Ecological Status ◽  
Taal Volcano ◽  
Ecological Barriers ◽  
Floral Diversity ◽  
Forested Areas ◽  
Baseline Information ◽  
Study Sites ◽  
Terrestrial Biodiversity

With the exponential rise of human activities in the past decades, majority of studies conducted in Taal Volcano Protected Landscape (TVPL) are geared towards the conservation and preservation of Lake Taal’s remaining biodiversity. However, the current structure and assemblage of its terrestrial biotic communities remain relatively unstudied. In this study, we conducted biodiversity censuses in the four sites in TVPL to provide baseline information regarding the community structure of the selected study sites. Comparison of the plant diversity in Taal Volcano Crater Island and Romandan Falls within the forested areas of Mataas na Kahoy, Batangas reveal that both sites support remarkably different vegetation, with the former supporting a smaller floral diversity. The fairly small number of animal samples present difficulty in providing conclusive findings to the wildlife structure of the two study sites. However, the presence of 11 animal species exhibit valuable results in determining the ecological status of TVPL. It is deduced that several ecological barriers exist between the sites, which is attributed to their unique terrestrial biota.

The effect of nutrition on fibre characteristics and production in the alpaca

1995 ◽  
Vol 1995 ◽  
pp. 101-101
Author(s):  
A.J.F. Russel ◽  
H. Redden ◽  
J.W. Kay
Keyword(s):  
Animal Species ◽  
Fibre Length ◽  
Fibre Production ◽  
The Other ◽  
South American ◽  
Cashmere Goat ◽  
Lack Of Information ◽  
The Relationship ◽  
Positive Effect ◽  
Fibre Characteristics

In single-coated animal species selected for fibre production, such as sheep and Angora goats, nutrition is known to have a positive effect on fibre length and diameter, and hence on the weight of fibre produced, while in double-coated species, such as the cashmere goat, the fibre characteristics of the undercoat appear relatively insensitive to nutritional influence. Recent studies on the relationship between nutrition and fibre production in the llama, a double-coated species, indicate that it conforms to the above generalisation in that the growth rate and diameter of its fibre are not amenable to nutritional manipulation (Russel and Redden, 1994). There is a lack of information on the effects of nutrition on fibre characteristics and production in the other domesticated species of South American camelid, the single-coated alpaca. The experiment reported here was designed to provide such information.

scholarly journals Development of a fish-based index for the assessment of the ecological status of Lake Balaton in the absence of present day reference condition

2020 ◽  
pp. 11 ◽  
Author(s):  
András Specziár ◽  
Tibor Erős
Keyword(s):  
Native Species ◽  
Ecological Status ◽  
Fish Fauna ◽  
Native Fish ◽  
Lake Balaton ◽  
Anthropogenic Pressures ◽  
Key Species ◽  
Good Ecological Status ◽  
Electric Fishing

A fish-based index is proposed to indicate the ecological status of Lake Balaton, Hungary in accordance with the standard of the European Water Framework Directive (WFD). The Balaton fish index (BFI) synthetises information of 13 lake-specific fish metrics including gillnetting and electric fishing data of species richness of native assemblages, relative abundance, biomass and age structure of native key species, representation of non-native species and general health status. The main anthropogenic pressures considered were the degradation of littoral habitats, invasion of non-native fish species, eutrophication and fishing/angling including stocking. Ecological quality ratio (EQR) is assessed by relating actual fish assemblage metrics to the supposed undisturbed reference status of Lake Balaton reconstructed by expert judgement based on recent and historic information on the fish fauna and its changes. Values of BFI were consistent and indicated good ecological status of Lake Balaton in the period of 2005–2018. This study provides an example on how an EQR assessment methodology might be established in unique habitats with no possibilities for statistical evaluation of pressure-respond relationships and exact determination of the reference status.

Now that we have our pest-proof fence, are we safe or trapped?

2012 ◽  
Vol 18 (2) ◽  
pp. 77 ◽  
Author(s):  
Heather Parks ◽  
Kyle Clifton ◽  
Lauren Best ◽  
Bridget Johnson
Keyword(s):  
Invasive Species ◽  
New Zealand ◽  
Native Species ◽  
Animal Species ◽  
The Other ◽  
Pest Species ◽  
Native Plant ◽  
Other Hand ◽  
Free Status

PEST-PROOF (exclusion) fences are designed to prevent non-native, predatory and pest species from repopulating an area set aside to protect vulnerable native plant and animal species. Pest-proof fencing provides security from invasive species, but can isolate the native species enclosed within. On one hand, some rare native species exist on the mainland due to the pest-free status achieved through the use of exclusion fences. On the other hand, these reintroduced populations are now isolated a situation where they would not be found naturally (Jamieson et al. 2006). Exclusion fences must be constantly maintained or the sanctuary risks reinvasion. An important question for conservation biologists and managers to answer is therefore — when is exclusion fencing the best option for protecting native species from introduced pests? We have drawn our examples from New Zealand and Australia where progress has been made with regard to the design and utilization of exclusion fences.

Temporal Changes in the Suburban Avifauna of an Inland City

1981 ◽  
Vol 8 (1) ◽  
pp. 109 ◽  
Author(s):  
DN Jones
Keyword(s):  
Species Diversity ◽  
Population Density ◽  
Native Species ◽  
Bird Community ◽  
Linear Increase ◽  
Residential Area ◽  
Wagga Wagga ◽  
Residential Areas ◽  
House Sparrows ◽  
The Individual

The suburban bird community of Wagga Wagga, N.S.W., was surveyed during December 1978-January 1979 and May 1979, at nine sites selected to cover all ages of residential areas from predevelopment to oldest suburbs and to demonstrate how the bird community will change with time in response to changing habitat. Non-residential sites were also sampled. Sites were censused by foot transect. House sparrows which were present in all sites, were the first species to colonize new residential areas and made up over 95% of the individual count of four sites Of native species, 40% were found in undeveloped sites only. The population density of undeveloped sites was only half that of developed sites, but the greatest species diversity was found in undeveloped sites and the lowest in the most altered sites. There was strong evidence for a steady linear increase in numbers of individuals, numbers of species, biomass and population density with increasing age of residential area, reaching a peak at about 30 years.

scholarly journals The Influence of Tree Structural and Species Diversity on Temperate Forest Productivity and Stability in Korea

Forests ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 1113 ◽  
Author(s):  
Juhan Park ◽  
Hyun Seok Kim ◽  
Hyun Kook Jo ◽  
II Bin Jung
Keyword(s):  
Species Diversity ◽  
Tree Species ◽  
Temperate Forest ◽  
Temperate Forests ◽  
Basal Area ◽  
Stand Density ◽  
Structural Diversity ◽  
Forest Productivity ◽  
Tree Species Diversity ◽  
Positive Effect

Research Highlights: Using a long-term dataset on temperate forests in South Korea, we established the interrelationships between tree species and structural diversity and forest productivity and stability, and identified a strong, positive effect of structural diversity, rather than tree species diversity, on productivity and stability. Background and Objectives: Globally, species diversity is positively related with forest productivity. However, temperate forests often show a negative or neutral relationship. In those forests, structural diversity, instead of tree species diversity, could control the forest function. Materials and Methods: This study tested the effects of tree species and structural diversity on temperate forest productivity. The basal area increment and relative changes in stand density were used as proxies for forest productivity and stability, respectively. Results: Here we show that structural diversity, but not species diversity, had a significant, positive effect on productivity, whereas species diversity had a negative effect, despite a positive effect on diversity. Structural diversity also promoted fewer changes in stand density between two periods, whereas species diversity showed no such relation. Structurally diverse forests might use resources efficiently through increased canopy complexity due to canopy plasticity. Conclusions: These results indicate reported species diversity effects could be related to structural diversity. They also highlight the importance of managing structurally diverse forests to improve productivity and stability in stand density, which may promote sustainability of forests.

Animal species diversity at a land–water ecotone in Mongolia

Limnology ◽  
2010 ◽  
Vol 12 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Masato Hasumi ◽  
Tsagaan Hongorzul ◽  
Khayankhyarvaa Terbish
Keyword(s):  
Species Diversity ◽  
Animal Species ◽  
Land Water

scholarly journals Effects of the Trophobiont HerbivoreCalloconophora pugionata(Hemiptera) on Ant Fauna Associated withMyrcia obovata(Myrtaceae) in a Montane Tropical Forest

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Roberth Fagundes ◽  
Kleber Del-Claro ◽  
Sérvio Pontes Ribeiro
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Tropical Forest ◽  
Host Plant ◽  
Atlantic Forest ◽  
Main Hypothesis ◽  
Ant Assemblages ◽  
Montane Tropical Forest ◽  
Positive Effect ◽  
Dominant Ant

Many studies have investigated the mechanisms behind the structure of arboreal ant assemblages. In this study, the objective was to evaluate the effect of availability of honeydew-producing colonies ofCalloconophora pugionata(Membracidae) on the structure of ant assemblages associated with the host plantMyrcia obovata(Myrtaceae) in an Atlantic forest of Minas Gerais (Brazil). Our experiment consisted in a gradual exclusion of hemipteran colonies out of the host plant crown and further record of the ant assemblage response (species richness, composition, and occurrence) to the presence and density of treehopper colonies. The hypothesis was that an increase in the number of trophobiont herbivores results in an increase in tending ant occurrence but a reduction in ant species diversity. Results corroborated our main hypothesis: membracids had a positive effect on the occurrence of ants but negative on species richness. Overall insect occurrence was also reduced with increasing inC. pugionatacolonies, probably due to strengthening dominant ant species territory sizes and intensification of patrolling.

Abundance, Activity, Diversity, and Species Interactions of Ground-Dwelling Ants (Hymenoptera: Formicidae) in Open Versus Canopied Habitats in Central Georgia (USA)

2020 ◽  
Vol 55 (4) ◽  
pp. 469-486
Author(s):  
Reid M. Ipser ◽  
Wayne A. Gardner
Keyword(s):  
Species Diversity ◽  
Population Density ◽  
Species Interactions ◽  
Native Species ◽  
Fire Ant ◽  
Red Imported Fire Ant ◽  
Visual Searches ◽  
Georgia Population ◽  
Open Versus ◽  
Imported Fire Ant

Abstract The red imported fire ant, Solenopsis invicta Buren (Hymenoptera: Formicidae), and ground-dwelling ant species native to Georgia were observed and studied in tree-canopied and open uncanopied habitats in two state parks in central Georgia. Population density, native species diversity, and interactions of native species with each other and with the invasive S. invicta were determined and compared in the two habitats. Sampling methods included pitfall traps, baits, collection of leaf litter, and visual searches. In comparison to the open uncanopied habitats, red imported fire ant population density was lower in tree-canopied habitats, and native ant species diversity was greater in the canopied habitats. We also observed native species competing with red imported fire ants more intensely in canopied than in open habitats primarily by foraging activity and by predation of S. invicta reproductives. Our results suggest that native ant species can suppress S. invicta population numbers and density and that competition by native ant species should be considered in approaches of managing red imported fire ant.

Sign in / Sign up

Export Citation Format

Share Document