scholarly journals Aquatic macroinvertebrates of headwater streams in the south east forests - diversity and conservation management issues

2006 ◽  
Vol 23 (1) ◽  
pp. 1
Author(s):  
Jan Miller ◽  
Robert Miller
Keyword(s):  
Conservation Management ◽  
Headwater Streams ◽  
Aquatic Macroinvertebrates ◽  
The South ◽  
Management Issues

Bioaccumulation of Heavy Metals by Aquatic Macroinvertebrates Along the Basento River in the South of Italy

2008 ◽  
Vol 201 (1-4) ◽  
pp. 19-31 ◽  
Author(s):  
A. Santoro ◽  
G. Blo ◽  
S. Mastrolitti ◽  
F. Fagioli
Keyword(s):  
Heavy Metals ◽  
Aquatic Macroinvertebrates ◽  
The South

scholarly journals Microclimate Observation at Hermann’s Tortoise (Testudo hermanni boettgeri) Habitat in the “Iron Gates” Natural Park. Case Study: Lower Eșelniţa Watershed (Banat, Romania)

2014 ◽  
Vol 16 (3) ◽  
pp. 47-58
Author(s):  
Cristiana-Maria Ciocanea ◽  
Athanasios-Alexandru Gavrilidis ◽  
Vasile Bagrinovschi
Keyword(s):  
Climate Change ◽  
Global Climate Change ◽  
Vegetation Structure ◽  
Conservation Management ◽  
Global Climate ◽  
Suitable Habitat ◽  
The South ◽  
Natural Park ◽  
Testudo Hermanni

Abstract “Iron Gates” Natural Park is located in the South-Western part of Romania and is recognized for its great diversity of ecosystems, wide variety of species and emblematic landscapes. Due to its Mediterranean climatic influences and vegetation structure, the area is a suitable habitat for the existence and development of Testudo hermanni boettgeri. Monitoring both, the evolution of the microclimatic features in the lower Eșelnița watershed and the species behaviour, represents a useful step in order to determine if the global climate change endangers the conservation management of the tortoise.

scholarly journals Population structure and historical demography of South American sea lions provide insights into the catastrophic decline of a marine mammal population

2016 ◽  
Vol 3 (7) ◽  
pp. 160291 ◽  
Author(s):  
J. I. Hoffman ◽  
G. J. Kowalski ◽  
A. Klimova ◽  
L. J. Eberhart-Phillips ◽  
I. J. Staniland ◽  
...  
Keyword(s):  
Population Structure ◽  
Large Scale ◽  
Conservation Management ◽  
Population Decline ◽  
Natural Populations ◽  
Hypervariable Region ◽  
Baseline Data ◽  
South American ◽  
The South ◽  
Demographic Bottleneck

Understanding the causes of population decline is crucial for conservation management. We therefore used genetic analysis both to provide baseline data on population structure and to evaluate hypotheses for the catastrophic decline of the South American sea lion ( Otaria flavescens ) at the Falkland Islands (Malvinas) in the South Atlantic. We genotyped 259 animals from 23 colonies across the Falklands at 281 bp of the mitochondrial hypervariable region and 22 microsatellites. A weak signature of population structure was detected, genetic diversity was moderately high in comparison with other pinniped species, and no evidence was found for the decline being associated with a strong demographic bottleneck. By combining our mitochondrial data with published sequences from Argentina, Brazil, Chile and Peru, we also uncovered strong maternally directed population structure across the geographical range of the species. In particular, very few shared haplotypes were found between the Falklands and South America, and this was reflected in correspondingly low migration rate estimates. These findings do not support the prominent hypothesis that the decline was caused by migration to Argentina, where large-scale commercial harvesting operations claimed over half a million animals. Thus, our study not only provides baseline data for conservation management but also reveals the potential for genetic studies to shed light upon long-standing questions pertaining to the history and fate of natural populations.

scholarly journals Lessons from the South Auckland Winter milk monitoring programme, 1987-1997

1997 ◽  
pp. 205-208
Author(s):  
G.P. Jones ◽  
M.W. Auld ◽  
W.J. Hanson
Keyword(s):  
New Zealand ◽  
Milk Production ◽  
Production Systems ◽  
Monitoring Programme ◽  
Annual Production ◽  
The South ◽  
Total Annual Production ◽  
Early Use ◽  
Supply Systems ◽  
Management Issues

The performance of winter milk production systems, represented by between 7 and 17 New Zealand Dairy Group suppliers in the South Auckland area, has been assessed for seven consecutive years. The monitoring programme has enabled comparison of winter milk systems with typical seasonal supply systems, and identification of management issues facing winter milkers. In 1995/ 96 the monitored farms had contract volumes ranging between 7 and 32 litres/ha (average 21 litres/ha). This reflected the total situation for all the NZDG winter milkers. Total annual production is also critical for profitability, and ranged between 684 and 1107 kg milksolids (MS)/ha in the year ending 31 August 1996 (mean 920 ± 144 kg MS/ha). The main requirements for successful winter milk production include planning and acting early for winter, in particular by: 1. early use of supplements in the autumn, including hay, silage and urea; 2. appropriate drying off of cows; and 3. grazing drystock off the home farm, so it can be effectively used as a milking platform. Keywords: dairying, farm monitoring, South Auckland, winter milk

Characterization of Storm Flow Dynamics of Headwater Streams in the South Carolina Lower Coastal Plain1

2012 ◽  
Vol 49 (1) ◽  
pp. 76-89 ◽  
Author(s):  
Thomas H. Epps ◽  
Daniel R. Hitchcock ◽  
Anand D. Jayakaran ◽  
Drake R. Loflin ◽  
Thomas M. Williams ◽  
...  
Keyword(s):  
South Carolina ◽  
Headwater Streams ◽  
Flow Dynamics ◽  
The South ◽  
Storm Flow

scholarly journals Kangaroo management in the South Australian rangelands: Impacts and challenges for conservation management

2021 ◽  
Vol 22 (S1) ◽  
pp. 24-34 ◽  
Author(s):  
Graeme Finlayson ◽  
Kurt Tschirner ◽  
Justin McCann ◽  
Matt Appleby
Keyword(s):  
Conservation Management ◽  
The South

scholarly journals DNA-based identification of aquatic invertebrates useful in the South African context?

2016 ◽  
Vol Volume 112 (Number 5/6) ◽  
Author(s):  
Hermoine J. Venter ◽  
Cornelius C. Bezuidenhout ◽  
◽  
Keyword(s):  
South Africa ◽  
Dna Barcoding ◽  
South African ◽  
High Throughput Sequencing ◽  
Environmental Dna ◽  
Bulk Sample ◽  
Aquatic Macroinvertebrates ◽  
South African Context ◽  
The South ◽  
African Context

Abstract The concept of using specific regions of DNA to identify organisms – processes such as DNA barcoding – is not new to South African biologists. The African Centre for DNA Barcoding reports that 12 548 plant species and 1493 animal species had been barcoded in South Africa by July 2013, while the Barcode of Life Database (BOLD) contains 62 926 records for South Africa, 11 392 of which had species names (representing 4541 species). In light of this, it is surprising that aquatic macroinvertebrates of South Africa have not received much attention as potential barcoding projects thus far – barcoding of aquatic species has tended to focus on invasive species and fishes. Perusal of the BOLD records for South Africa indicates a noticeable absence of aquatic macroinvertebrates, including families used for biomonitoring strategies such as the South African Scoring System. Meanwhile, the approach of collecting specimens and isolating their DNA individually in order to identify them (as in the case of DNA barcoding), has been shifting towards making use of the DNA which organisms naturally shed into their environments (eDNA). Coupling environmental and bulk sample DNA with high-throughput sequencing technology has given rise to metabarcoding, which has the potential to characterise the whole community of organisms present in an environment. Harnessing barcoding and metabarcoding approaches with environmental DNA (eDNA) potentially offers a non-invasive means of measuring the biodiversity in an environment and has great potential for biomonitoring. Aquatic ecosystems are well suited to these approaches – but could they be useful in a South African context?

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