. Bonner zoologische Monographien. Zoology. BONNER ZOOLOGISCHE MONOGRAPHIEN Nr. 56/2011. 2- 5- 9- 17- 33- 65- 129- 257- 513- 1025- 2049- >4096 4 8 16 32 64 128 256 512 1024 2048 4096 Body mass (g) FIG. 29. Proportion of species per body mass class (log2 scale) and broad foraging guild in the bird commu- nity of Playa de Oro (n = 336). Abbreviations used: PA-O = passerine omnivore; NP-O = non-passerine omnivore; PA-F/G = passerine frugivore and/or granivore; NP-F/G = non-passerine frugivore and/or grani- vore; NEC = nectarivore; PA-I = passerine insectivore; NP-I = non-passerine insectivore;
. Bonner zoologische Monographien. Zoology. BONNER ZOOLOGISCHE MONOGRAPHIEN Nr. 56/2011. 2- 5- 9- 17- 33- 65- 129- 257- 513- 1025- 2049- >4096 4 8 16 32 64 128 256 512 1024 2048 4096 Body mass (g) FIG. 29. Proportion of species per body mass class (log2 scale) and broad foraging guild in the bird commu- nity of Playa de Oro (n = 336). Abbreviations used: PA-O = passerine omnivore; NP-O = non-passerine omnivore; PA-F/G = passerine frugivore and/or granivore; NP-F/G = non-passerine frugivore and/or grani- vore; NEC = nectarivore; PA-I = passerine insectivore; NP-I = non-passerine insectivore; CAR = carnivore; includes here, apart from scavengers, diurnal raptors and nocturnal raptors as well as piscivores. (Xl = , P = ) were not significant. Thus the unexpectedly low number of birds weighing 17-32 g seems to be a genuine characteristic of the bird com- munity and independent of broad habitat or status categories. The mean body size of core species differed dras- tically among foraging guilds (Fig. 29). The nectar- ivorous Trochilidae are uniformly small, ranging from only 2 to g (xcore = ± ; core species only). In general, passerines tend to be considerably smaller than non-passerines belonging to the same foraging guild; , insectivorous passerines (xcgre - ± g) are on average almost four times lighter than their non-passerine counterparts (xcgre - ± g), frugivorous and granivorous passer- ines (xcore = ± g) are almost 15 times smaller than non-passerines (xcgre = ± g) in the same guilds, and for omnivorous taxa the re- lationship between mean body masses of passerines (xcgre = ± g) and non-passerines (xcore = ± g) is about one to seven. Note that these numbers are not easily comparable with other studies because I have used a much broader definition of omnivores' than most authors. The smallest taxon of the bird community was Phaethornis striigularis (Trochilidae) with
Size: 2253px × 1109px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectzoology
