scholarly journals MOVE MORE, GAIN LESS: EFFECT OF A RECREATIONAL TRAIL SYSTEM ON CHILDHOOD BMI

2019 ◽  
Vol 38 (2) ◽  
pp. 270-288
Author(s):  
Bongkyun Kim ◽  
Michael R. Thomsen ◽  
Rodolfo M. Nayga ◽  
Di Fang ◽  
Anthony Goudie
Keyword(s):  
Author(s):  
James Pritchard

This project investigated the history of the backcountry trail system in Grand Teton National Park (GTNP). In cooperation with GTNP Cultural Resources and the Western Center for Historic Preservation in GTNP, we located records describing the early development of the trail system. Only a few historical records describe or map the exact location of early trails, which prove useful when relocating trails today. The paper trail becomes quite rich, however, in revealing the story behind the practical development of Grand Teton National Park as it joined the National Park Service system.


2015 ◽  
Vol 22 (Suppl 1) ◽  
pp. A137.1-A137
Author(s):  
MR Gutiérrez Cívicos ◽  
I Español Morales ◽  
P Conesa Zamora ◽  
D Gutiérrez-Meca Maestre ◽  
MH García Lagunar ◽  
...  

2006 ◽  
Vol 66 (3) ◽  
pp. 791-802 ◽  
Author(s):  
N. O. Aguiar ◽  
T. L. Gualberto ◽  
E. Franklin

In Amazonia, nothing is known about the distribution of the invertebrates on a medium-spatial scale pattern. In a trail system of 64 km² at Ducke Reserve, we sampled 72 transects using the hand-sorting method and Berlese-Tullgren extraction. The reserve possesses ecosystems of "terra-firme" forest and the trail system represents a gradient of topographic soil factors and vegetation, avoiding categorizations. Considering the abundance and diversity of Pseudoscorpionida, we investigated the relation of the community to environmental factors tested (topography, clay percentage, litter, and soil pH), to the two major drainage basins of the reserve, and if these invertebrates can be used as biological indicators to monitor changes. We registered two species for the first time in the reserve, increasing the known diversity to 17 species. The lack of correlation with the predictor variables and the large home range, indicate that pseudoscorpions are not good biological indicators in the reserve. As the eastern and western watersheds are not separate management units for the community, our results show that they are generalist predators. In spite of our results and lack of knowledge concerning their biology, life history and taxonomy, pseudoscorpions are cosmopolitan and easy to find and measure. Compared with previous studies in the reserve, they have a consistent pattern of abundance and diversity throughout the years showing the stability of the community which can be checked mainly by comparison with environmental changes that would occur in the reserve. An investigation on a medium-spatial scale pattern and over a long-term period including other habitats, and also other predictor variables, like humidity, the structure of the vegetation and canopy closure, will be necessary to reinforce the observed tendencies.


2021 ◽  
Vol 53 (8S) ◽  
pp. 186-186
Author(s):  
Douglas A. Gregory ◽  
Eugene C. Fitzhugh
Keyword(s):  

2019 ◽  
Vol 19 (33) ◽  
pp. 190-204
Author(s):  
Brayan H. Morera-Chacón ◽  
Víctor J. Acosta-Chaves

We present the list of amphibians for the El Silencio de Los Ángeles Cloud Forest (Villa Blanca Hotel and Reserve) in San Ramón de Alajuela, Costa Rica, Central America. We performed nocturnal visual and acoustic surveys in the trail system, mainly from 2013 to 2014. We also received data from the local guides up to 2019. We compared the similarity of amphibian richness of our site against other premontane reserves in Costa Rica with a cluster analysis (Jaccard index, single linkage). We recorded 26 species distributed in 16 genera, eight families and two orders. Notrotiton gamezi was the only threatened species detected. The El Silencio de los Ángeles Cloud Forest site is around 80 % similar to San Lorencito River Station and 55% to Nectandra Reserve. Containing 12% of the Costa Rica’s amphibian richness, this premontane woodland should be considered among the most important clouded forest in Central Costa Rica for amphibian conservation.


Author(s):  
Jarlyson Brunno Costa Souza ◽  
Mádilo Lages Vieira Passos ◽  
Eduardo Arouche da Silva ◽  
Armando Lopes de Brito Filho ◽  
Samira Luns Hatum de Almeida ◽  
...  

The soybean crop (Glycine max. (L.) Merril) shows strong participation in the Brazilian economy. Therefore, the aim of the present study was to quantify the losses in the cutting and feeding platform and in the trail system in mechanized soybean harvest by analyzing different speed and rotation adjustments of the trailing cylinder. The experiment was carried out in a commercial soybean plot on a farm located in the municipality of Brejo (MA), during the 2017/2018 harvest. The harvester evaluated was a Case IH 8120, with a maximum power of 34.2 kW, axial flow system, and 12.2-m platform equipped with a conveyor system (draper). The experiment was conducted in two different areas. Area 1 was planted with the Brasmax® Opus (BMX Opus) cultivar, while area 2 was cultivated with the BRS 9383 cultivar. The treatments consisted of three machine speeds (4 km h-¹, 6 km h-¹, and 7 km h-¹), associated with the rotation levels of 500 rpm and 800 rpm in the trail system. The experimental design used was randomized blocks in a 3 x 2 factorial arrangement, with four replications. For the BMX Opus cultivar, harvest losses did not influence the travel speeds and rotations evaluated in the experiment due to the marked instability within the treatments. The BRS 9383 cultivar showed satisfactory results at a speed of 4 km h-1 combined with a rotation of 800 rpm, which obtained acceptable numbers for the soybean harvest (54.09 kg ha-1).


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