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Titolo:
Advantages of seed dispersal: A re-evaluation of directed dispersal
Autore:
Wenny, DG;
Indirizzi:
Illinois Nat Hist Survey, Savanna Field Stn, Savanna, IL 61074 USA Illinois Nat Hist Survey Savanna IL USA 61074 Stn, Savanna, IL 61074 USA
Titolo Testata:
EVOLUTIONARY ECOLOGY RESEARCH
fascicolo: 1, volume: 3, anno: 2001,
pagine: 51 - 74
SICI:
1522-0613(200101)3:1<51:AOSDAR>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
TROPICAL RAIN-FOREST; MONKEYS ALOUATTA-SENICULUS; DISSEMINATED WOODY-PLANTS; GAP-PHASE REGENERATION; FRUGIVOROUS BIRDS; FRENCH-GUIANA; CYANOCITTA-CRISTATA; NEOTROPICAL FOREST; TEMPERATE FOREST; SPATIAL PATTERNS;
Keywords:
colonization; directed dispersal; dispersal quality; escape; nurse plants; recruitment foci; safe sites; seed dispersal; seed shadow;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
222
Recensione:
Indirizzi per estratti:
Indirizzo: Wenny, DG Illinois Nat Hist Survey, Savanna Field Stn, 3159 Crim Dr, Savanna, IL 61074 USA Illinois Nat Hist Survey 3159 Crim Dr Savanna IL USA 610744 USA
Citazione:
D.G. Wenny, "Advantages of seed dispersal: A re-evaluation of directed dispersal", EVOL EC RES, 3(1), 2001, pp. 51-74

Abstract

Seed dispersal can be advantageous (1) in escape from density- or distance-dependent seed and seedling mortality, (2) by colonization of suitable sites unpredictable in space and time, and (3) by directed dispersal to particular sites with a relatively high probability of survival. Most previous research on the consequences of seed dispersal has focused on escape and colonization because adaptations ensuring directed dispersal are not expected under the paradigm of diffuse mutualism that characterizes the modern view of seed dispersal evolution. In this paper, I suggest that directed dispersal is more common than previously believed even in the absence of plant adaptations to promote it. Directed dispersal may be seen in particular among animal-dispersed plants and in arid ecosystems or successional areas, but has been overlooked due to the lack of detailed data on seed shadows generated by particular species, and the fact that the alternative advantages of dispersal are not mutually exclusive. Although directed dispersal is never thought to be the only advantage of dispersal, it may often be ecologically important if one dispersal vector has a disproportionate effect on plant recruitment. Furthermore, in human-disturbed and managed ecosystems, directed dispersal may be important in restoration. More studies detailing the consequences of different patterns of seed dispersal will be useful for conservation and management strategies.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 07:48:16