The Analysis of Class Dispersion Patterns Using Matrix Comparisons

Harvey, Léa; Davis, Frank W.; Gale, Nathan

doi:10.2307/1940452

Cited by 7 publications

(2 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…soil and micrometeorological properties). Many studies have shown soil properties to be heterogeneous over a distance of a few meters (Robertson et al 1988;Palmer & Dixon 1990) and this would be especially true for the makatea where soil collects in pockets on the pit and pinnacle karst (Harvey, Davis & Gale 1988).…”

Section: Discussionmentioning

confidence: 99%

Species‐environment patterns of forest vegetation on the uplifted reef limestone of Atiu, Mangaia, Ma'uke and Miti'aro, Cook Islands

Franklin

Merlin

1992

J Vegetation Science

View full text Add to dashboard Cite

Abstract. We examined woody species composition and its relation to environmental variables in native forest growing on four limestone islands in the southern Cook Islands: Atiu, Mangaia, Ma'uke, and Miti'aro. Relative dominance (percent basal area) of woody species in 74 sites was sampled using the point‐centered quarter method, and the data were analyzed using clustering and ordination techniques. These tropical forests have a relatively low diversity of native woody species (32 native and 10 introduced species occurred in our sites). Four forest types were recognized: Pandanus/Guettarda littoral forest (with several subtypes), Hernandia nymphaeifolia littoral forest, Barringtonia littoral forest, and makatea forest (dominated by Elaeocarpus tonganus and Hernandia moeren‐houtiana). These types were related, using canonical correspondence analysis, to geographical attributes (wind‐wardness, elevation, and proximity to the coast or roads) that served as surrogates for environmental variables (maritime influence, soil variation, and degree of human disturbance). The eigenvalues for this direct ordination were much lower than for indirect ordination (0.32 vs. 0.71 for the first axis), indicating that the measured geographical attributes could explain only a modest portion of the compositional variation.

show abstract

Section: Discussionmentioning

confidence: 99%

Species‐environment patterns of forest vegetation on the uplifted reef limestone of Atiu, Mangaia, Ma'uke and Miti'aro, Cook Islands

Franklin

Merlin

1992

J Vegetation Science

View full text Add to dashboard Cite

show abstract

“…The spatial patterns of white vc types and white isolates on the grafted trees were determined using the double matrix test of HARVEY et al (1988). One matrix contained the distances between the cankers and the white hypovirulent strain-inoculated zone on the stem, and the second matrix indicated whether isolates belonged to the same culture type or vc type.…”

Section: Spatial Pattern Of White Vc Types On the Grafted American Chmentioning

confidence: 99%

Spread ofCryphonectria hypovirus1into 45 vegetative compatibility types ofCryphonectria parasiticaon grafted American chestnut trees

Hogan

Griffin

2002

Forest Pathology

View full text Add to dashboard Cite

A mixture of hypovirulent strains of Cryphonectria parasitica, including four white (European) strains infected with Cryphonectria hypovirus 1 (CHV1), was used in 1982 and 1983 to inoculate natural blight cankers located within a zone ranging from the ground to 183 cm on grafted American chestnut trees. These four white strains belonged to three vegetative compatibility (vc) types. Using pigmented, single-spore colonies from white isolates, 48 vc types were identi®ed among 110 white isolates recovered in 1996, 1998, and 1999 from cankers located outside the inoculated zone. Twenty-®ve of the 48 white vc types consisted of two or more isolates. The 25 major white vc types were vegetatively incompatible with all four of the original white hypovirulent strains, providing evidence for spread of CHV1 but not for spread of the original inoculated strains. Forty-®ve vc types represent the minimum number of`new' vc types into which CHV1 had spread. The ratio of white vc types to white isolates tested (S/N) and Shannon diversity index were 0.436 and 3.64, respectively. The spatial pattern of white vc types on the grafts was found to be non-random (p 0.019). White single-spore colonies of white isolates were placed into four cultural morphology (CM) groups. The two largest groups contained 37 (CM group 3) and 33 (CM group 1) isolates. Single-spore colonies from the original, white inoculated strain, Ep 49, were classi®ed into CM groups 3 and 1, and colonies of Ep 51 W were classi®ed into CM group 1.

show abstract

Introduction to Spatial Statistics

Davis¹

1993

Lecture Notes in Biomathematics

View full text Add to dashboard Cite

The Analysis of Class Dispersion Patterns Using Matrix Comparisons

Cited by 7 publications

References 33 publications

Species‐environment patterns of forest vegetation on the uplifted reef limestone of Atiu, Mangaia, Ma'uke and Miti'aro, Cook Islands

Species‐environment patterns of forest vegetation on the uplifted reef limestone of Atiu, Mangaia, Ma'uke and Miti'aro, Cook Islands

Spread ofCryphonectria hypovirus1into 45 vegetative compatibility types ofCryphonectria parasiticaon grafted American chestnut trees

Introduction to Spatial Statistics

Contact Info

Product

Resources

About