Species diversity of entomophilous plants and flower-visiting insects is sustained in the field margins of sunflower crops Author Torretta, Juan Pablo CONICET - Cátedra de Botánica Agrícola, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C 1417 DSE, Buenos Aires, Argentina; Author Poggio, Santiago L. IFEVA / CONICET - Cátedra de Producción Vegetal, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C 1417 DSE, Buenos Aires, Argentina text Journal of Natural History 2013 2013-01-15 47 3 - 4 139 165 http://dx.doi.org/10.1080/00222933.2012.742162 journal article 10.1080/00222933.2012.742162 1464-5262 4631907

Table 1. Description of the study sites.

Sites (acronyms)	Sáenz Peña	Reconquista	Sunchales (SU) Paraná (PA) Paunero (P)			Roca (RO)	Hortensia	Balcarce (BA)
Weather data from: aCeres, bRío Cuarto, cGral Pico, dPehuajó, eTandil.
	(SP)	(RE)					(HO)
Geographic coordinates	26◦ 51′ 125′′ S 29◦ 12′ 21.1′′ S 30◦ 55′ 04.7′′ S 31◦ 49′ 31.2′′ S 33◦ 53′ 28.0′′ S 34◦ 59′ 51.3′′ S 35◦ 56′ 44.9′′ S 37◦ 46′ 54.8′′ S 60◦ 24′ 449′′ W 59◦ 39′ 36.4′′ W 61◦ 34′ 57.5′′ W 60◦ 26′ 22.1′′ W 65◦ 00′ 05.5′′ W 64◦ 18′ 06.7′′ W 61◦ 11′ 43.7′′ W 58◦ 18′ 44.6′′ W
Phytogeographic	Chaco	Chaco	Espinal	Espinal	Inland Pampa	Inland Pampa	Inland Pampa	Southern
provinces								Pampa
Altitude (m above	86	50	97	84	376	173	76	109
sea level)
Annual mean T min (◦C)	16.3	15	13.4a	13.1	11.2b	9.9c	10.0d	8.2e
Annual mean T max (◦C)	278	25.6	25.6a	23.8	22.9b	22.9c	21.9d	20.0e
Annual mean	1254	1380	942a	1126	847b	934c	1015d	889e
precipitation
(mm)
Sampling dates	9–13 Nov 2004 15–19 Nov		14–21 Dec	18–22 Dec	4–9 Jan 2006	18–22 Dec 2006 4–10 Jan 2007		21–27 Jan 2005
		2004	2005	2004
Sampling effort	22	27	26	19	26	24	20	12
(hours)
Field area (ha)	46	20	37	25	50	48	50	25
Field perimeter	2750	1800	2460	2000	3000	2880	2950	1970
(m)
Neighbouring	sunflower	sunflower	sunflower	sunflower	sunflower	sunflower	sunflower	sunflower
crops	pasture	pasture	Pasture	pasture	pasture	alfalfa	wheat maize	soybean
			foxtail millet	maize		maize