Disposição a pagar pelos serviços ecossistêmicos da água em uma bacia hidrográfica da maior região semiárida da América do Sul

Josimar Vieira dos Reis

Programa de Pós-Graduação em Desenvolvimento e Meio Ambiente (PRODEMA/UFPE) - Recife/PE, Brasil. prej86@gmail.com, josicleda@ufpe.br

Mario de Miranda Vilas Boas Ramos Leitão

Programa de Pós-Graduação em Agroecologia e Desenvolvimento Territorial (PPGADT/UNIVASF) - Juazeiro/BA, Brazil. mario.miranda@univasf.edu.br

Josicleda Domiciano Galvincio

Programa de Pós-Graduação em Desenvolvimento e Meio Ambiente (PRODEMA/UFPE) - Recife/PE, Brasil. prej86@gmail.com, josicleda@ufpe.br

Contribuição dos autores

Josimar Vieira dos Reis desenvolveu a teoria e fez todos os cálculos. Os professores orientadores Josicleda Galvincio e Mario Miranda, desenvolveram junto ao discente os métodos analíticos e as correções, como encorajaram Josimar Reis a investigar e a aplicar os questionários no terreno onde também supervisionaram os resultados deste estudo. Todos os autores discutiram os resultados e discussão e contribuíram para o manuscrito final.

	Type of ecosystem services regulation	Sources and/or specific examples
1	Regulation of the Microclimate	Air temperature, reduction on the speed of the wind, soil temperature, increase in precipitation.
2	Water regulation (flow)	Better infiltration and percolation in the soil, run-off to aquifers, more perennial rivers.
3	Flood and erosion regulation	Regulation of the removal of the particle from the rock and the soil by the action of water, less leaching of the surface layer, protection of riverbanks.
4	Water purification	Ecosystem conservation in the seasonally dry forest, protection of sources, protection of aquifers.
5	Retention of sediments	Soil aggregation, higher volume of organic matter, higher soil saturation.

	n	%
Age Group
18 to 24 years old	171	43.4
25 to 34 years old	96	24.4
35 to 44 years old	48	12.2
45 to 54 years old	66	16.8
55 to 65 years old	13	3.3
Gender
Male	193	49.1
Female	200	50.8
Municipality where you live in the Pontal basin - PE
Municipality of Afrânio	33	8.4
Municipality of Dormentes	38	9.7
Municipality of Lagoa Grande	91	23.2
Municipality of Petrolina	231	58.8
Schooling
Incomplete Elementary School	13	3.3
Complete Elementary School	13	3.3
Incomplete High School	10	2.5
Complete High School	105	26.8
Technical Course	13	3.3
Higher Education (Undergraduate Course)	173	43.9
Postgraduate/Graduate	66	16.8
How much is your personal monthly income?
Less than a minimum wage at R$ 998.00	179	45.4
Between R$ 998.00 and R$ 1,996.00	50	12.7
Between R$ 1,996.00 and R$ 2,994.00	27	6.9
Between R$ 2,994.00 and R$ 3,992.00	113	28.7
More than R$ 3,992.00	25	6.3

	n	%
Would you be willing to pay for the environmental conservation of the ecosystem services of regulation in the Pontal River?
Yes	307	77.9
No	86	22.1
How much are you willing to pay to promote the environmental conservation of the ecosystem services of regulation in the Pontal River?
R$ 2.00	46	11.7
R$ 5.00	79	20.1
R$ 10.00	104	26.4
R$ 15.00	22	5.6
R$ 20.00	24	6.1
R$ 25.00	7	1.8
More than R$ 30.00	4	1.0
I don't know	108	27.4

	n	%
Do you think that the Riacho do Pontal-PE river basin provides regulatory ecosystem services through the Pontal River?
Yes	173	43.9
No	42	10.7
Don't know	179	45.4
According to your understanding, the ecosystem services, if conserved, can contribute to which natural processes in the Riacho do Pontal-PE river basin?
Regulation of the Microclimate	54	7.7
Water regulation (flow)	47	6.7
Flood and erosion regulation	17	2.4
Water purification	251	35.6
Retention of sediments	13	1.8
All quoted	109	15.5

Brasil