. Elements of ecology. Ecology. Modification of Succession 445 on a small scale in many local habitats. One example is furnished by the activity of certain animals in maintaining open "glades" on the surface of rocks in the tidal zone (Fig. ). The browsing of limpets at the margins of their territories shears away the enlarging basal holdfasts of the red algae that would normally grow over the rock surface in the course of succession. Another animal, Idotea viridis, bores holes in the fronds of the algae so that they break away easily and thus assists in affecting succession in
. Elements of ecology. Ecology. Modification of Succession 445 on a small scale in many local habitats. One example is furnished by the activity of certain animals in maintaining open "glades" on the surface of rocks in the tidal zone (Fig. ). The browsing of limpets at the margins of their territories shears away the enlarging basal holdfasts of the red algae that would normally grow over the rock surface in the course of succession. Another animal, Idotea viridis, bores holes in the fronds of the algae so that they break away easily and thus assists in affecting succession in this microhabitat. In contrast to the situations mentioned above the activities of man may sometimes add a stage beyond the usual climax. In certain parts of southern California the climax vegetation formerly consisted of grass or chaparral. When man introduced the eucalyptus from Australia, this tree established extensive stands replacing the former vegetation and adding a forest stage to the previously recognized limit to succession in the region. Ecologists have taken such an interest in pointing out the occur- rence of succession and its importance under various circumstances that emphasis has failed to be laid upon the fact that in some regions. Photo by H. IS. .\f,.oif Fig. Pineland community in southern Florida, consisting principally of pines, palmettos, and sawgrass. After such an area is burned over, the same type of community is reestablished Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Clarke, George L. (George Leonard), 1905-. New York, Wiley
Size: 1810px × 1381px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookpublishernewyorkwiley, booksubjectecology
