Is the spatial pattern of a tree population in a seasonally dry tropical climate explained by density-dependent mortality?

被引:7
作者
Silveira, Andrea Pereira [1 ,2 ]
Martins, Fernando Roberto [3 ]
Menezes, Bruno Sousa [2 ]
Araujo, Francisca Soares [2 ]
机构
[1] Ceara State Univ UECE, Itapipoca Fac Educ, Course Biol, Ave Monsenhor Tabosa S-No, BR-62500000 Itapipoca, Brazil
[2] Univ Fed Ceara, Dept Biol, Grad Course Ecol & Nat Resources, Fortaleza, Ceara, Brazil
[3] Univ Campinas UNICAMP, Inst Biol, Dept Plant Biol, Campinas, SP, Brazil
关键词
population ontogenetic stages; rainfall stochasticity; seasonally dry tropical forest; spatial association; spatial structure; SEED DISPERSAL; WOODY VEGETATION; RAIN-FOREST; DYNAMICS; PLANT; ESTABLISHMENT; DIVERSITY; SAVANNA; HETEROGENEITY; ASSOCIATIONS;
D O I
10.1111/aec.12556
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Spatial pattern of tropical plants is initially generated by limited seed dispersal, but the role of density-dependent and independent mechanisms as modifiers of these patterns across ontogeny is poorly understood. We investigated whether density-dependent mortality (DDM) and environmental heterogeneity can drive spatial pattern across the ontogeny of a tree in a seasonally dry tropical climate. We used Moran's I correlograms and spatial analysis by distance indices (SADIE) to assess the spatial patterns of the pre- and post-germinative stages of Cordia oncocalyx (Boraginaceae), an abundant tree endemic in the deciduous thorny woodland in the northeastern Brazilian semiarid region. We also used RDA to analyse the effect of DDM and environmental heterogeneity (measured by microtopography and canopy openness) in the mortality and recruitment. Seeds, seedlings, juveniles and adults showed aggregated spatial patterns; infants and immatures were randomly distributed; adults, seeds and seedlings attracted each other while adult, juveniles and immatures repulsed each other. Infant and seedling mortality rates were related to DDM and the recruitment from infant to juvenile was more influenced by spatial heterogeneity. Attraction was determined by local dispersal; repulsion was related to DDM and environment heterogeneity, which allowed the return to aggregation in adult stage. Together, these results indicated that spatial pattern can change across ontogeny, in which the initial stages are responsive to DDM and the final stages are influenced by spatial heterogeneity.
引用
收藏
页码:191 / 202
页数:12
相关论文
共 70 条
[1]  
[Anonymous], 2019, R Package Version
[2]  
Araújo Francisca Soares de, 2011, Rodriguésia, V62, P341, DOI 10.1590/2175-7860201162210
[3]   Spatial patterns reveal negative density dependence and habitat associations in tropical trees [J].
Bagchi, Robert ;
Henrys, Peter A. ;
Brown, Patrick E. ;
Burslem, David F. R. P. ;
Diggle, Peter J. ;
Gunatilleke, C. V. Savitri ;
Gunatilleke, I. A. U. Nimal ;
Kassim, Abdul Rahman ;
Law, Richard ;
Noor, Supardi ;
Valencia, Renato L. .
ECOLOGY, 2011, 92 (09) :1723-1729
[4]  
Barot S, 1999, ECOLOGY, V80, P1987, DOI 10.1890/0012-9658(1999)080[1987:DOASPT]2.0.CO
[5]  
2
[6]   Dissecting the spatial structure of ecological data at multiple scales [J].
Borcard, D ;
Legendre, P ;
Avois-Jacquet, C ;
Tuomisto, H .
ECOLOGY, 2004, 85 (07) :1826-1832
[7]  
Brito L.B.M., 2009, Rev. Caat, V22, P206
[8]   Abiotic factors influencing tropical dry forests regeneration [J].
Ceccon, E ;
Huante, P ;
Rincón, E .
BRAZILIAN ARCHIVES OF BIOLOGY AND TECHNOLOGY, 2006, 49 (02) :305-312
[9]   Resource pulses, species interactions, and diversity maintenance in arid and semi-arid environments [J].
Chesson, P ;
Gebauer, RLE ;
Schwinning, S ;
Huntly, N ;
Wiegand, K ;
Ernest, MSK ;
Sher, A ;
Novoplansky, A ;
Weltzin, JF .
OECOLOGIA, 2004, 141 (02) :236-253
[10]   Are plant populations seed limited? A critique and meta-analysis of seed addition experiments [J].
Clark, C. J. ;
Poulsen, J. R. ;
Levey, D. J. ;
Osenberg, C. W. .
AMERICAN NATURALIST, 2007, 170 (01) :128-142