scholarly journals The Role of Small Woodland Remnants on Ground Dwelling Insect Conservation in Chaco Serrano, Central Argentina

2013 ◽  
Vol 13 (40) ◽  
pp. 1-13 ◽  
Author(s):  
María Laura Moreno ◽  
María Guadalupe Fernández ◽  
Silvia Itati Molina ◽  
Graciela Valladares
Keyword(s):  
Insect Conservation ◽  
Central Argentina ◽  
Chaco Serrano

The effects of dehydration and local soil on parasite recovery: A preliminary paleoparasitological evaluation on experimental coprolites

The Holocene ◽  
2021 ◽  
pp. 095968362110499
Author(s):  
Darío Alejandro Ramirez ◽  
Mariana Fabra ◽  
Samanta Xavier ◽  
Alena Mayo Iñiguez
Keyword(s):  
Equal Mass ◽  
Central Argentina ◽  
Soil Sediment ◽  
Local Soil ◽  
Before And After ◽  
Fresh Feces ◽  
Flotation Technique ◽  
First Time ◽  
Taphonomic Processes

Experimental paleoparasitological approaches have been used in order to optimize the methodology previously to the application in archeological samples. In this study we evaluated the action of dehydration and local soil (Central Argentina) on the loss of parasite eggs in experimental coprolites, using two parasitological techniques: spontaneous sedimentation and sucrose-flotation. Experimental coprolites comprised fresh human feces, positive for Hymenolepis nana, Ascaris sp., and Enterobius vermicularis, submitted to controlled artificial dehydration. Experimental coprolites with soil addition were prepared by mixing archeological sediment with equal mass of fresh feces. Helminth eggs were counted and eggs per gram were estimated in each subsample. Statistical analyses were applied to compare subsamples before and after desiccation and with and without addition of soil sediment. The performance of parasitological methods statistically differed, the sucrose flotation technique being the less effective when fresh feces and experimental coprolites were analyzed. Partial deformation of eggs was observed via both techniques only in subsamples containing H. nana eggs. However, this was not seen in Ascaris sp. subsamples, possibly due to eggshell composition. We found that sample desiccation significantly decreased the number of eggs in the experimental coprolites. Mixing archeological sediment with the fecal material also resulted in significantly fewer eggs surviving, independent of desiccation. This shows that climate and soil in which archeological fecal samples are found can strongly influence the survival of parasite eggs from past populations. The small amount of parasite evidence often found in paleoparasitological analyses, including Central Argentina, could be attributed to the action of taphonomic processes rather than to the real absence of infection in these ancient populations. Importantly, the study highlights the role of local soil, confirmed for the first time by empirical data. The research provides valuable insights into the understanding of the paleoparasitological results of the region and of general paleoparasitology.

Mycorrhizal status of plant species in the Chaco Serrano Woodland from central Argentina

Mycorrhiza ◽  
2009 ◽  
Vol 19 (3) ◽  
pp. 205-214 ◽  
Author(s):  
Sebastian Fracchia ◽  
Adriana Aranda ◽  
Analia Gopar ◽  
Vanesa Silvani ◽  
Laura Fernandez ◽  
...  
Keyword(s):  
Plant Species ◽  
Central Argentina ◽  
Chaco Serrano ◽  
Mycorrhizal Status

The Role of the Amateur in Insect Conservation

1997 ◽  
Vol 4 (3) ◽  
pp. 159 ◽  
Author(s):  
Paul-Michael Brunelle
Keyword(s):  
Insect Conservation

Post-fire recovery occurs overwhelmingly by resprouting in the Chaco Serrano forest of Central Argentina

2013 ◽  
Vol 39 (3) ◽  
pp. 346-354 ◽  
Author(s):  
Romina C. Torres ◽  
Melisa A. Giorgis ◽  
Cecilia Trillo ◽  
Luis Volkmann ◽  
Pablo Demaio ◽  
...  
Keyword(s):  
Central Argentina ◽  
Chaco Serrano
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