Differences between understorey and canopy in herbivore community composition and leaf quality for two oak species in Missouri

Corff, Josiane Le; Marquis, Robert J.

doi:10.1046/j.1365-2311.1999.00174.x

Cited by 82 publications

(85 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Other studies in oaks found the same results as Feeny (1970); they reported a negative relationship between the concentration of tannins in the plant and the abundance and richness of herbivores (leaf-chewing insects, leaf miners, and gall-forming) that inhabit the canopy of Q. alba, Q. velutina (Le Corff and Marquis 1999;Forkner et al 2004), Q. crispula (Murakami et al 2005(Murakami et al , 2008, Q. geminata, Q. laevis Stiling 2006, 2008), and Q. gambelii × Q. grisea (Yarnes et al 2008).…”

Section: Chemistry Of the Host Plantmentioning

confidence: 57%

Oak canopy arthropod communities: which factors shape its structure?

Valencia-Cuevas

Tovar-Sánchez

2015

Rev. Chil. de Hist. Nat.

View full text Add to dashboard Cite

Canopy of forest ecosystems has been recognized as a habitat that supports a wide variety of plants, vertebrates, invertebrates, and microbes. Within the invertebrate group, arthropods are characterized by their great abundance, diversity, and functional importance. Particularly in temperate forests, species of the genus Quercus (oaks) are one of the most important tree canopy groups, for its diversity and dominance. Different studies have shown that the oak canopy contains a high diversity of arthropods suggesting their importance as habitat for this group of organisms. In this review, we investigated the factors that determine the establishment, organization, and maintenance of arthropod communities in the oak canopy. In general, it was found that there is a lack of literature that addresses the study of oak canopy arthropod communities. Also, the following patterns were found: (a) the research has covered a wide variety of topics; however, there are differences in the depth to which each topic has been analyzed, (b) there are ambiguous criteria to define the structure of the canopy, (c) groups with different habitat preferences belonging to different guilds and uneven development stages have been studied, avoiding generalizations about patterns found, (d) the standardization in sampling techniques and collection has been difficult, (e) bias exists towards the study of phytophagous insects belonging to the Coleoptera, Hymenoptera, and Lepidoptera orders, and (f) there are few studies in other groups of arthropods, for example, acorn borers, whose activity has an impact on the fitness and dispersion of the host plants. Finally, we propose that the detection and study of patterns in oak canopy communities can be of great value to propose management and conservation strategies in these forests.

show abstract

Section: Chemistry Of the Host Plantmentioning

confidence: 57%

Oak canopy arthropod communities: which factors shape its structure?

Valencia-Cuevas

Tovar-Sánchez

2015

Rev. Chil. de Hist. Nat.

View full text Add to dashboard Cite

show abstract

“…Variation in microclimatic conditions and resource quality might impede the diversity of Lepidoptera along a vertical gradient (Schulze, Linsenmair, & Fiedler, 2001). Due to its higher foliage quality, the understory of temperate forests harbors more species‐rich lepidopteran assemblages than the canopy (Hirao et al., 2009; Le Corff & Marquis, 1999). Therefore, the higher diversity recorded in the first level might be due to the involvement of understory species, supporting our original hypothesis.…”

Section: Discussionmentioning

confidence: 99%

“…Specifically, we expect density, diversity, and parasitism rates to decrease from the first toward the third canopy level, due to harsher abiotic conditions and lower foliage quality toward the upper canopy (Hirao, Murakami, & Kashizaki, 2009; Le Corff & Marquis, 1999). Moreover, in temperate forests, the understory contributes to lepidopteran diversity more than the canopy (Hirao et al., 2009; Le Corff & Marquis, 1999), with canopy and understory assemblages potentially sharing many species (Hirao et al., 2009). Therefore, we also expect an increased involvement of understory species in the first canopy level, leading to an increase in their density and diversity, and, consequently, parasitoid density and diversity.…”

Section: Introductionmentioning

confidence: 99%

Vertical canopy gradient shaping the stratification of leaf‐chewer–parasitoid interactions in a temperate forest

Šigut

Šigutová

Šipoš

et al. 2018

Ecology and Evolution

View full text Add to dashboard Cite

Knowledge about herbivores and their parasitoids in forest canopies remains limited, despite their diversity and ecological importance. Thus, it is important to understand the factors that shape the herbivore–parasitoid community structure, particularly the effect of vertical gradient. We investigated a quantitative community dataset of exposed and semiconcealed leaf‐chewing larvae and their parasitoids along a vertical canopy gradient in a temperate forest. We sampled target insects using an elevated work platform in a 0.2 ha broadleaf deciduous forest plot in the Czech Republic. We analyzed the effect of vertical position among three canopy levels (first [lowest], second [middle], and third [highest]) and tree species on community descriptors (density, diversity, and parasitism rate) and food web structure. We also analyzed vertical patterns in density and parasitism rate between exposed and semiconcealed hosts, and the vertical preference of the most abundant parasitoid taxa in relation to their host specificity. Tree species was an important determinant of all community descriptors and food web structure. Insect density and diversity varied with the vertical gradient, but was only significant for hosts. Both host guilds were most abundant in the second level, but only the density of exposed hosts declined in the third level. Parasitism rate decreased from the first to third level. The overall parasitism rate did not differ between guilds, but semiconcealed hosts suffered lower parasitism in the third level. Less host‐specific taxa (Ichneumonidae, Braconidae) operated more frequently lower in the canopy, whereas more host‐specific Tachinidae followed their host distribution. The most host‐specific Chalcidoidea preferred the third level. Vertical stratification of insect density, diversity, and parasitism rate was most pronounced in the tallest tree species. Therefore, our study contradicts the general paradigm of weak arthropod stratification in temperate forest canopies. However, in the network structure, vertical variation might be superseded by variation among tree species.

show abstract

“…In contrast, on Quercus spp. in the USA, more leaf-chewing species fed on sapling than on conspecific trees, and none were restricted to the canopy (Le Corff and Marquis 1999).…”

Section: Discussionmentioning

confidence: 99%

“…Fowler 1985;Schowalter and Ganio 1998;Le Corff and Marquis 1999). In tropical rainforests, many abiotic and biotic characteristics of the upper canopy (the uppermost leaf layer) are different from those of lower forest layers.…”

Section: Introductionmentioning

confidence: 99%

Communities of insect herbivores foraging on saplings versus mature trees of Pourouma bicolor (Cecropiaceae) in Panama

Basset

2001

Oecologia

View full text Add to dashboard Cite

The arthropod fauna of 25 saplings and of three conspecific mature trees of Pourouma bicolor (Cecropiaceae) was surveyed for 12 months in a tropical wet forest in Panama, with particular reference to insect herbivores. A construction crane erected at the study site provided access to tree foliage in the upper canopy. A similar area of foliage (ca. 370 m 2 ) was surveyed from both saplings and trees, but samples obtained from the latter included 3 times as much young foliage as from the former. Arthropods, including herbivores and leafchewing insects with a proven ability to feed on the foliage of P. bicolor were 1.6, 2.5 and 2.9 times as abundant on the foliage of trees as on that of saplings. The species richness of herbivores and proven chewers were 1.5 (n=145 species) and 3.5 (n=21) times higher on trees than on saplings, respectively. Many herbivore species preferred or were restricted to one or other of the host stages. Host stage and young foliage area in the samples explained 52% of the explained variance in the spatial distribution of herbivore species. Pseudo-replication in the two sampling universes, the saplings and trees studied, most likely decreased the magnitude of differences apparent between host stages in this forest. The higher availability of food resources, such as young foliage, in the canopy than in the understorey, perhaps combined with other factors such as resource quality and enemyfree space, may generate complex gradients of abundance and species richness of insect herbivores in wet closed tropical forests.

show abstract

Differences between understorey and canopy in herbivore community composition and leaf quality for two oak species in Missouri

Cited by 82 publications

References 29 publications

Oak canopy arthropod communities: which factors shape its structure?

Oak canopy arthropod communities: which factors shape its structure?

Vertical canopy gradient shaping the stratification of leaf‐chewer–parasitoid interactions in a temperate forest

Communities of insect herbivores foraging on saplings versus mature trees of Pourouma bicolor (Cecropiaceae) in Panama

Contact Info

Product

Resources

About