TY - JOUR
T1 - Forest structure of three endemic species of the genus polylepis (Rosaceae) in central Perú
AU - Camel, Vladimir
AU - Quispe-Melgar, Harold Rusbelth
AU - Ames-Martínez, Fressia N.
AU - Navarro Romo, Wendy C.
AU - Segovia-Salcedo, M. Claudia
AU - Kessler, Michael
N1 - Funding Information:
We also thank Esteban Galeano for helpful comments and suggestions; Jesid Ticse, Luis Salomé and Fernando Matías for supporting the field work. This research was funded by the Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica-CONCYTEC, project 149-2015-FONDECYT-DE.
Funding Information:
We thank the Servicio Nacional Forestal y de Fauna Silvestre and the Servicio Nacional de Áreas Naturales Protegidas por el Estado for providing authorizations for research under the R.D.G. Nº 037-2017-SERFOR/DGGSPFFS and R.D. 023-2016-SERNANP-DGANP, respectively. We also thank Esteban Galeano for helpful comments and suggestions; Jesid Ticse, Luis Salomé and Fernando Matías for supporting the field work. This research was funded by the Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica-CONCYTEC, project 149-2015-FONDECYT-DE.
Publisher Copyright:
© 2019, Asociacion Argentina de Ecologia. All rights reserved.
PY - 2019/12
Y1 - 2019/12
N2 - Polylepis (Rosaceae) is the dominant tree genus in High-Andean forest ecosystems. These ecosystems are severely threatened, but little is known about their structure and functioning. We provide the first reports of the dasometric structure and spatial distribution of eight forests of Polylepis canoi, P. flavipila and P. rodolfovasquezii in the Central Peruvian Andes as fundamental information for management and conservation policies. We sampled all individuals ≥1 cm of diameter at ground level (DGL) in 20 plots of 10x10 m in each forest, and measured total height (TH) and DGL. Also, we mapped the spatial distribution of the individuals in two plots of 30x30 m (X and Y axes). We found differences in the dasometric structure between forests of the same species, which, in some cases, were associated with climate, soil or elevation variables. However, no well-defined pattern was found. The allometric relationships of the linear and non-linear models did not differ widely with respect to the R2 nor to the Akaike (AIC) scores, indicating that the forests did not show a saturation of tree height with increasing diameter. In the P. canoi forests, individuals with diameters ≥10 cm were the most abundant. In contrast, the forests of P. rodolfo-vasquezii showed a predominance of individuals with diameters ≤10 cm, whereas P. flavipila presented an altered structure with no relationship between DGL and TH in one of the evaluated forests. The analysis of spatial distribution according to the Ripley’s K function on a small scale revealed that P. flavipila and P. canoi presented random patterns, whereas P. rodolfo-vasquezii showed an aggregate pattern. Finally, our results showed that even forests of the same species have different dasometric structures, whereas spatial patterns differ only between species. So, caution must be taken when extrapolating information between species or forests during ecological studies and conservation actions.
AB - Polylepis (Rosaceae) is the dominant tree genus in High-Andean forest ecosystems. These ecosystems are severely threatened, but little is known about their structure and functioning. We provide the first reports of the dasometric structure and spatial distribution of eight forests of Polylepis canoi, P. flavipila and P. rodolfovasquezii in the Central Peruvian Andes as fundamental information for management and conservation policies. We sampled all individuals ≥1 cm of diameter at ground level (DGL) in 20 plots of 10x10 m in each forest, and measured total height (TH) and DGL. Also, we mapped the spatial distribution of the individuals in two plots of 30x30 m (X and Y axes). We found differences in the dasometric structure between forests of the same species, which, in some cases, were associated with climate, soil or elevation variables. However, no well-defined pattern was found. The allometric relationships of the linear and non-linear models did not differ widely with respect to the R2 nor to the Akaike (AIC) scores, indicating that the forests did not show a saturation of tree height with increasing diameter. In the P. canoi forests, individuals with diameters ≥10 cm were the most abundant. In contrast, the forests of P. rodolfo-vasquezii showed a predominance of individuals with diameters ≤10 cm, whereas P. flavipila presented an altered structure with no relationship between DGL and TH in one of the evaluated forests. The analysis of spatial distribution according to the Ripley’s K function on a small scale revealed that P. flavipila and P. canoi presented random patterns, whereas P. rodolfo-vasquezii showed an aggregate pattern. Finally, our results showed that even forests of the same species have different dasometric structures, whereas spatial patterns differ only between species. So, caution must be taken when extrapolating information between species or forests during ecological studies and conservation actions.
KW - Allometric models
KW - High Andean forests
KW - Polylepis
KW - Ripley’s K function
UR - http://www.scopus.com/inward/record.url?scp=85076203193&partnerID=8YFLogxK
U2 - 10.25260/ea.19.29.3.0.812
DO - 10.25260/ea.19.29.3.0.812
M3 - Original Article
AN - SCOPUS:85076203193
SN - 0327-5477
VL - 29
SP - 285
EP - 295
JO - Ecologia Austral
JF - Ecologia Austral
IS - 3
ER -