Ecological Archives A025-067-A1

Alejandro C. Costamagna, William N. Venables, and Nancy A. Schellhorn. 2015. Landscape-scale pest suppression is mediated by timing of predator arrival. Ecological Applications 25:11141130. http://dx.doi.org/10.1890/14-1008.1

Appendix A. Number and proportion of different land cover types mapped in the landscapes studied.

Table A1. Land cover types identified in the landscapes studies in the Lockyer Valley, during the experiments of November 2009 and March 2010. Major land categories represent areas > 4%, with the exception of Cucurbit crops, which was considered separately as it was the focal crop under study. Major land categories were used in multiple regression analysis to test their influence on aphid suppression, diversity categories were considered to estimate habitat diversity.

Major land categories

 

Diversity land cover categories

% area

# areas

Grassland

 

Grassland

25.920

828

---

 

Fallow land

21.863

935

Native vegetation

 

Native vegetation

21.088

210

Alfalfa

 

Alfalfa

5.833

275

Riparian vegetation

 

Riparian vegetation

4.540

26

Cucurbits

 

Cucurbits (melon, watermelon)

1.644

132

Other crops1

 

Sorghum

2.194

112

 

 

Weedy fields

1.670

88

 

 

Corn

1.011

34

 

 

Beans

0.993

39

 

 

Brassicas

0.794

44

 

 

Turf

0.603

53

 

 

Tomato

0.252

18

 

 

Onion

0.244

16

 

 

Spring onions

0.182

13

 

 

Carrots

0.124

4

 

 

Orchards

0.118

11

 

 

Potato

0.113

7

 

 

Capsicum

0.096

6

 

 

Cereal grains

0.081

8

 

 

Lettuce

0.055

6

 

 

Sunflower

0.038

6

 

 

Celery

0.025

5

 

 

Hay

0.022

1

 

 

Beetroot

0.016

1

 

 

Silver beet

0.014

2

 

 

Sweet potato

0.003

1

---

 

Houses and urban2

4.359

949

---

 

Roads2

1.803

136

---

 

Water (lakes, water storage ponds)2

1.892

465

1 Other crops include all crops representing < 4% of area (except cucurbits)
2 Fallow fields, houses, roads, and water bodies were not considered in the multiple regression analysis as they are not a significant source of insects.


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