Ecological Archives E086-161-A5

Lynn S. Adler and Rebecca E. Irwin. 2005. Ecological costs and benefits of defenses in nectar. Ecology 86:2968–2978.

Appendix E (Table E1). Means ± standard error for measures of female reproduction in 2002 and 2004, broken down by floral morph and nectar treatment.

Response

Floral Morph

Nectar alkaloids

2002

2004

Fruits

   

Pin

Low

13.2 ± 2.6

5.28 ± 1.83

Pin

High

11.5 ± 2.5

5.67 ± 1.24

Thrum

Low

12.5 ± 2.1

7.42 ± 1.76

Thrum

High

14.3 ± 2.5

4.60 ± 1.45

Seeds/fruit

   

Pin

Low

14.4 ± 0.5

12.55 ± 0.73

Pin

High

13.9 ± 0.4

12.47 ± 0.75

Thrum

Low

12.6 ± 0.5

11.91 ± 0.45

Thrum

High

12.7 ± 0.6

12.92 ± 0.41

Seed mass in g (2002) or
Proportion seed set (2004)

Pin

Low

0.0426 ± 0.0022

0.71 ± 0.03

Pin

High

0.0434 ± 0.0028

0.72 ± 0.03

Thrum

Low

0.0427 ± 0.0018

0.69 ± 0.03

Thrum

High

0.0424 ± 0.0021

0.73 ± 0.02

   Notes: The only significant differences were the effect of floral morph on seeds per fruit in 2002, and the interaction between nectar treatment and floral morph on fruits in 2004 (see Results). N = 19 plants for each group in 2002. In 2004 for pin/low, pin/high, thrum/low and thrum/high, N = 18, 18, 19, and 20 plants for fruits and 10, 15, 18, and 15 plants for seed data respectively (since not all plants produced fruits).



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