Total aboveground plant biomass is more strongly affected by climate than species diversity on a grassland in Liaoning, China;
La biomasa aérea total es más afectada por el clima que por la diversidad de especies en un pastizal natural de Liaoning, China.
Key Laboratory for Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, 130024, China., Busso, C; Departamento de Agronomía-CERZOS (CONICET), Universidad Nacional del Sur, 8000 Bahía Blanca, Argentina., Liu, J; School of Life Sciences, Liaoning University, Shenyang, 110036, China., Yang, YG; School of Life Sciences, Liaoning University, Shenyang, 110036, China., Sun, Y; School of Life Sciences, Liaoning University, Shenyang, 110036, China., Fang, YZ; School of Life Sciences, Liaoning University, Shenyang, 110036, China., Zhang, QQ; School of Life Sciences, Liaoning University, Shenyang, 110036, China., Zhou, YB; School of Life Sciences, Liaoning University, Shenyang, 110036, China.
College of Life Science and Bioengineering, Shenyang University, Shenyang, 110044, China., Wang, YN; School of Life Sciences, Liaoning University, Shenyang, 110036, China.
College of Life Science and Bioengineering, Shenyang University, Shenyang, 110044, China., Zhang, Z; College of Life Science and Bioengineering, Shenyang University, Shenyang, 110044, China.
Hulunber Grassland Ecosystem Research Station of Chinese Academy of Agricultural Sciences., Wang, ZW; State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Science, Shenyang, 110016, China., Yang, YF; Key Laboratory for Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, 130024, China.
Colaborador:
- We thankfully acknowledge support of National Science Foundation of China (Grant 31570332, 31472134, 31360574), Outstanding Young Scholars Foundation of Higher University in Liaoning Province(LJQ2014004), Open Foundation of Key Laboratory for Vegetation E
The objective of this study was to analyze the relationshipsbetween total aboveground plant biomass versus altitude, latitude,longitude, mean annual temperature, mean annual precipitation,and species diversity. Simple linear regression analysis was usedto study these relationships. Results showed that altitude was significantly,positively (R2= 0.038, P<0.01) related with total plant abovegroundbiomass. Meanwhile, when longitude (R2= 0.124, P<0.001)and latitude (R2= 0.221, P<0.001) increased, total aboveground biomassdecreased. The relationship between biomass and mean annualprecipitation was significantly, positively linear (R2= 0.149, P<0.001).Mean annual temperature was significantly, negatively correlatedwith biomass (R2= 0.145, P<0.001). The relationship between speciesdiversity and biomass was significant, but relatively weaker (i.e.,R2<0.063, P<0.05) compared with those for the climatic variables.This is, species diversity explained less than 7% of the total variabilityin total aboveground plant biomass. This result agrees with theidiosyncratic response hypothesis which suggests that ecosystem functionchanges when species diversity changes, but the magnitude anddirection of these changes are unpredictable because the roles of individualplant species are complex and varied.
El objetivo de este estudio fue analizar las relacionesentre la biomasa vegetal aérea total versus altitud, latitud, longitud,temperatura promedio anual, precipitación promedio anual, y diversidadde especies. Se utilizó regresión lineal simple para estudiar estasrelaciones. Los resultados mostraron que la altitud se relacionó positivamente,significativamente (R2= 0,038, P<0,01) con la biomasa aéreatotal. Al mismo tiempo, cuando la longitud (R2= 0,124, P<0,001)y la latitud (R2= 0,221, P<0,001) se incrementaron, la biomasa aéreatotal disminuyó. La biomasa aérea total y la precipitación promedioanual estuvieron positivamente, significativamente (R2= 0,149,P<0,001) relacionadas. La temperatura promedio anual estuvo negativamente,significativamente (R2= 0,145, P<0,001) relacionada conla biomasa aérea total. Sin embargo, y si bien la diversidad de especiesy la biomasa aérea total se relacionaron negativamente, significativamente(i.e., R2<0,063, P<0,05), dicha relación fue comparativamentemás débil que aquella obtenida para las variables climáticas. Es decir,la diversidad de especies explicó menos de 7% de la variación totalen la biomasa aérea total. Este resultado concuerda con la hipótesis derespuesta idiosincrática la cual sugiere que la función del ecosistemacambia cuando la diversidad de especies cambia, pero la magnitud ydirección de estos cambios son impredecibles debido a que los rolesindividuales de las especies son complejos y variados.
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Key Laboratory for Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, 130024, China.
College of Life Science and Bioengineering, Shenyang University, Shenyang, 110044, China.
College of Life Science and Bioengineering, Shenyang University, Shenyang, 110044, China.
Hulunber Grassland Ecosystem Research Station of Chinese Academy of Agricultural Sciences.