Joseph A. LaManna, Washington University in St. LouisFollow
Scott A. Mangan, Washington University
Alfonso Alonso, Smithsonian Conservation Biology Institute
Norman A. Bourg, U.S. Geological Survey
Warren Y. Brockelman, BIOTEC, National Science and Technology Development Agency
Sarayudh Bunyavejchewin, Department of National Parks
Li-Wan Chang, Taiwan Forestry Research Institute
Iyh-Min Chiang, Tunghai University
George B. Chuyong, University of Buea
Keith Clay, Indiana University
Susan Cordell, U.S. Department of Agriculture Forest Service
Stuart J. DAvies, National Museum of Natural History
Tucker J. Furniss, Utah State University
Christian P. Giardina, U.S. Department of Agriculture Forest Service
I. A.U. Nimal Gunatilleke, University of Peradeniya
C. V. Savitri Gunatilleke, University of Peradeniya
Fangliang He, Sun Yat-sen University
Robert W. Howe, University of Wisconsin - Green Bay
Stephen P. Hubbell, University of California - Los Angeles
Chang-Fu Hsieh, National Taiwan University
Faith M. Inman-Narahari, U.S. Department of Agriculture Forest Service
David Janik, Silva Tarouca Research Institute
Daniel J. Johnson, Utah State University
David Kenfack, Smithsonian Tropical Research Institute
Lisa Korte, Smithsonian Conservation Biology Institute
Kamil Král, Silva Tarouca Research Institute
Andrew J. Larson, University of Montana - Missoula
James A. Lutz, Utah State University
Sean M. McMahon, Smithsonian Environmental Research Center
William J. McShea, Smithsonian Conservation Biology Institute
Hervé R. Memiaghe, Institut de Recherche en Ecologie Tropicale
Anuttara Nathalang, National Science and Technology Development Agency
Vojtech Novotny, New Guinea Binatang Research Centre
Perry S. Ong, University of the Philippines Diliman
David A. Orwig, Harvard University
Rebecca Ostertag, University of Hawaii
Geoffrey G. Parker, Smithsonian Environmental Research Center
Richard P. Phillips, Indiana University - Bloomington
Lawren Sack, University of California - Los Angeles
I-Fang Sun, National Dong Hwa University
J. Sebastián Tello, Missouri Botanical Gardens
Duncan W. Thomas, Washington State University
Benjamin L. Turner, Smithsonian Tropical Research Institute
Dilys M. Vela Díaz, Washington University
Tomáš Vrška, Silva Tarouca Research Institute
George D. Weiblen, University of Minnesota - St. Paul
Amy Wolf, University of Wisconsin - Green Bay
Sandra Yap, Institute of Arts and Sciences
Jonathan A. Myers, Washington University

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American Association for the Advancement of Science

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DOI: 10.1126/science.aar3824


Hülsmann and Hartig suggest that ecological mechanisms other than specialized natural enemies or intraspecific competition contribute to our estimates of conspecific negative density dependence (CNDD). To address their concern, we show that our results are not the result of a methodological artifact and present a null-model analysis that demonstrates that our original findings—(i) stronger CNDD at tropical relative to temperate latitudes and (ii) a latitudinal shift in the relationship between CNDD and species abundance—persist even after controlling for other processes that might influence spatial relationships between adults and recruits.


Accepted version. Science, Vol. 99, No. 6 (June 2018) :1265-1276. DOI. © 2018 American Association for the Advancement of Science. Used with permission.

Joseph A. LaManna was affiliated with Washington University at the time of publication.

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