Abstract Detail



Evolution, ecology, development, and conservation of carnivorous plants

Givnish, Thomas J [1], Sparks, Kenneth W [2], Hunter, Steve [3], Pavlovič , Andrej [4].

Why are plants carnivorous? Cost/benefit analysis, whole-plant growth, and the context-specific advantages of botanical carnivory.

The cost/benefit model for the rise of carnivorous plants addressed their potential energetic and ecological advantages in detail for the first time in 1984. Over the ensuing years, it has provided a conceptual framework for research on carnivore distribution, allocation to traps, variation in trap mechanism, association with growth form, low rates of photosynthesis and whole-plant growth, and ecology relative to plants with other mechanisms of nutrient capture (e.g., myrmecotrophy, N fixation). Here we re-assess this model, discuss how it can be extended, and demonstrate the degree to which its assumptions and predictions have proven correct. We review what is known about photosynthesis, respiration, relative growth rates, and resource allocation in carnivores vs. non-carnivores, and the extent to which various resources limit their growth and stoichiometry, adaptation to different kinds of prey, and optimal patterns of allocation to carnivory. We provide potential explanations for paradoxes in (i) the increased allocation to traps in aquatic carnivores growing in harder, more “fertile” waters; (ii) the increased allocation to root nutrient uptake in some carnivores after prey capture; (iii) the low absolute rates of photosyn-thesis and whole-plant growth in carnivores; (iv) the distribution of several carnivores on cation-rich substrates; (v) increased allocation to carnivory instead of roots; and (vi) general restriction of carnivory to short-statured herbaceous plants.


1 - University Of Wisconsin-Madison, Department Of Botany, Birge Hall, 430 Lincoln Drive, Madison, WI, 53706, United States
2 - University of Wisconsin-Madison, Madison, WI, 53706, United States
3 - University Of Wisconsin - Madison, Department Of Botany, 430 Lincoln Drive, Madison, WI, 53706, United States
4 - Palacký University, Department of Biophysics, Olomouc, Czech Republic

Keywords:
optimality theory
nutrient capture
stoichiometry
Carnivorous Plants
ecological distribution
heterophylly.

Presentation Type: Symposium Presentation
Number: 0002
Abstract ID:257
Candidate for Awards:None


Copyright © 2000-2018, Botanical Society of America. All rights reserved