Table 1 Sample location details, relevance of sample and observations

CL1

Ebro River mouth

40° 43′ 10.20″ N

00° 51′ 20.88″ E

Part of ‘Delta del Ebro’ natural park. Included in list of Wetlands of International Importance [32]

Largest river in Spain. Instream of treated wastewater from large populations

CL2

El Clot de l’Ebre

40° 38′ 35.52″ N

00° 38′ 24.36″ E

Instream of irrigation water from rice agriculture

CL3

L’Estany Peníscola, lagoon

40° 21′ 59.04″ N

00° 24′ 01.80″ E

Flora micro reserve. Designated as Place of Community Interest by regional government

Potentially affected by human activity

CL4

L’Estany Peníscola, channel

40° 21′ 51.12″ N

00° 23′ 56.76″ E

CL5

Prat de Cabanes-Torreblanca

40° 11′ 50.28″ N

00° 12′ 31.32″ E

Included in list of Wetlands of International Importance [32]

Area with potential impact of citrus-fruit agriculture

CL6

Marjal Pego-Oliva

38° 52′ 23.52″ N

00° 02′ 53.88″ W

Included in list of Wetlands of International Importance [32]

Area with potential impact of citrus-fruit agriculture

CL7

Albufera. Portet Sollana

39° 18′ 37.08″ N

00° 21′ 25.92″ W

Part of ‘L’Albufera’ natural park. Included in list of Wetlands of International Importance [32]

Area with potential impact of rice agriculture

CL8

Albufera. Tancat de la Pipa

39° 22′ 05.52″ N

00° 20′ 45.60″ W

Instream of treated wastewater and urban runaways from the city of Valencia (~ 2,500,000 inh., Spain)

CL9

Albufera. Gola de Pujol

39° 20′ 14.04″ N

00° 11′ 32.64″ W

Highly tourist area of the natural park. Impact of human activity

CL10

L’Estany Almenara

39° 45′ 14.04″ N

00° 11′ 32.64″ W

Included in list of Wetlands of International Importance [32]

Area with potential impact of citrus-fruit agriculture

CL11

El Clot de Borriana

39° 52′ 46.92″ N

00° 03′ 14.04″ W

Natural park supplied with water from a natural spring

Area with potential impact of citrus-fruit agriculture