The Latitudinal Gradient of Species‐Area Relationships for Vascular Plants of North America

2007 ◽  
Vol 170 (5) ◽  
pp. 690-701 ◽  
Author(s):  
Hong Qian ◽  
Jason D. Fridley ◽  
Michael W. Palmer
Keyword(s):  
North America ◽  
Vascular Plants ◽  
Latitudinal Gradient ◽  
Species Area

Biogeography of island floras in the Great Lakes. I. Species richness and composition in relation to gull nesting activities

1989 ◽  
Vol 67 (4) ◽  
pp. 961-969 ◽  
Author(s):  
E. H. Hogg ◽  
J. K. Morton ◽  
Joan M. Venn
Keyword(s):  
Species Richness ◽  
Great Lakes ◽  
Plant Species ◽  
Vascular Plants ◽  
Soil Nutrient ◽  
Lake Huron ◽  
Great Lakes Region ◽  
Alien Plant ◽  
Species Area ◽  
The Difference

Species–area relations of vascular plants and the effect of nesting colonies of gulls on plant species composition were investigated for 77 islands in Georgian Bay and Lake Huron in the Great Lakes region of Canada. The percentage of plant species classed as alien, annual, or biennial was significantly greater on islands with gull colonies. The slope of the species–area curve was significantly steeper on islands supporting gull colonies compared with islands lacking gull colonies. The expected decline in species richness with increased island remoteness was not detected statistically using multiple regression analysis. The difference in species–area slopes does not appear to reflect a lower propagule immigration rate to islands with gull colonies, because gulls are important in the dispersal of alien plant species to these islands. Larger islands with gull colonies tended to have richer floras than islands of similar size without gull colonies. It is suggested that on these larger islands the presence of gull colonies produces a gradient of soil nutrient and disturbance regimes, thus increasing habitat heterogeneity and species richness.

scholarly journals Latitudinal trends in genus richness of vascular plants in the Eocene and Oligocene of North America

2016 ◽  
Vol 38 (3) ◽  
pp. 133-141 ◽  
Author(s):  
AJ. Harris ◽  
Cassondra Walker ◽  
Justin R. Dee ◽  
Michael W. Palmer
Keyword(s):  
North America ◽  
Vascular Plants ◽  
Genus Richness

Genetic variation in the diatomFragilaria capucina (Fragilariaceae) along a latitudinal gradient across North America

1997 ◽  
Vol 204 (1-2) ◽  
pp. 99-108 ◽  
Author(s):  
Raymond J. Lewis ◽  
Susan I. Jensen ◽  
Dean M. DeNicola ◽  
Virginia I. Miller ◽  
Kyle D. Hoagland ◽  
...  
Keyword(s):  
Genetic Variation ◽  
North America ◽  
Latitudinal Gradient

New desiccation-tolerant plants, including a grass, in the central highlands of Mexico, accumulate trehalose

2000 ◽  
Vol 48 (2) ◽  
pp. 153 ◽  
Author(s):  
G. Iturriaga ◽  
D. F. Gaff ◽  
R. Zentella
Keyword(s):  
North America ◽  
South America ◽  
Vascular Plants ◽  
Dry Weight ◽  
Resurrection Plant ◽  
Highland Area ◽  
Tolerant Plants ◽  
Tolerant Species ◽  
Representative Species ◽  
First Time

A grass endemic to Mexico, Sporobolus atrovirens, was identified for the first time as a desiccation-tolerant resurrection plant. Nine species of desiccation-tolerant vascular plants were found in the highland area of Mexico, including four species of ferns (Cheilanthes and Pellaea species) and three species of Selaginella. Two other grasses collected were known desiccation-tolerant species distributed from South America (Cordoba) to North America (Georgia). The ferns Ch. bonariensis, Ch. integerrima, Ch. myriophylla and P. sagittata are newly reported as desiccation-tolerant plants. The osmoprotectant trehalose which has been recorded as rare in plants was found in air-dry foliage of representative species of widely different taxa (9–291 µM g–1 dry weight). The flora of desiccation-tolerant species in Mexico is discussed in connection with its ability to accumulate trehalose.

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