... 105,400 (42,100) 13,340 (5328) Sobey and Kenworthy, 1979;2 Mizutani and Wada, 1988;3 Hahn et al., 2007;4 Otero and Mouriño, 2002;5 Smith and Johnson, 1995;6 Otero et al., 2018;7 Loder III et al., 1996;8 Zhu et al., 2009a;9 Yan et al., 2011;10 Fugler, 1985;11 Bancroft et al., 2005;12 Brimble et al., 2009;13 Zhu et al., 2011;14 Lindeboom, 1984;15 Mizutani et al., 1985;16 Zhu et al., 2009b;17 Metcheva et al., 2011;18 Xianyan et al., 2014;19 Zhu et al., 2006;20 García et al., 2002a;21 García et al., 2002b;22 Rajakaruna, 2009;23 ARCEA, 1999;24 Ligeza and Smal, 2003;25 Mataloni et al., 2010;26 Mizota, 2009a;27 Mizota, 2009b;28 Mizutani et al., 1986;29 Otero et al., 2015;30 Zwolicki et al., 2013;31 Anderson and Polis, 1999;32 De La Peña, 2012;33 Zhu et al., 2014;34 Ziółek and Melke, 2014; 35 Chen et al., 2014;36 Hobara et al., 2005;37 Piotr et al., 2014;38 Mulder et al., 2008;39 Wait et al., 2005;40 Schmidt et al., 2004;41 Wolfe et al., 2004;42 Mizota and Naikatini, 2007;43 Blakemore and Gibbs, 1968;44 Breuning-Madsen et al., 2008;45 Liu et al., 2006;46 Okazaki et al., 1993;47 Mulder and Keall, 2001;48 Hawke and Wu, 2012;49 Speir and Cowling, 1984;50 Simas et al., 2007. In nutrient-poor locations, seabird contributions become very important, for example in some mangroves (Adame et al., 2015) or areas affected by the "El Niño" phenomenon (Stapp et al., 1999;Molina-Montenegro et al., 2013). However, if the density of these birds is high, the effects become negative (Molina-Montenegro et al., 2013). ...