Abstract
On the Jornada Experimental Range in southern New Mexico, 2 belt transects, 30.5 cm in width and totaling 2,188 m in length, were established in 1935 on 2 areas where honey mesquite (Prosopis glandulosa Torr.) was spreading into black grama [Bouteloua eriopoda (Torr.) Torr.] grassland. Maps were made of the transects which portrayed the vegetation occurring in each of the 7,180 contiguous, $0.09\text{-}{\rm m}^{2}$ plots along the transect. The vegetation on the transects in 1980 was compared to that portrayed by the transect maps made in 1935. One transect had been read in 1950 and 1955. During the 45-year period mesquite attained complete dominance and many new mesquite dunes formed. Black grama had a relatively high frequency in 1935 but had completely disappeared by 1980, both on an area grazed by livestock and on an area protected from grazing. Mesa dropseed [Sporobolus flexuosus (Thurb.) Rydb.], fluffgrass [Erioneuron pulchellum (H.B.K.) Tateoka] and broom snakeweed [Xanthocephalum sarothrae (Pursh) Shinners] increased in abundance, even during the drought period between 1950 and 1955. Only 25% of the perennial forb species encountered in 1935-55 were found in 1980.
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Claims 7
Claim · model-written summary
Mesquite attained complete dominance over the 45-year period.
- Taxon
- Prosopis glandulosa
Neltuma glandulosae0 - Outcome
- complete dominancee1
- Setting
- Jornada Experimental Range in southern New Mexicoe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“honey mesquite (Prosopis glandulosa Torr.) was spreading into black grama [Bouteloua eriopoda (Torr.) Torr.] grassland”
e1“During the 45-year period mesquite attained complete dominance and many new mesquite dunes formed”
e5“On the Jornada Experimental Range in southern New Mexico”
Claim · model-written summary
Many new mesquite dunes formed during the 45-year period.
- Taxon
- Prosopis glandulosaNeltuma glandulosae0
- Outcome
- new mesquite dunese1
- Qualifier
- During the 45-year periode1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“honey mesquite (Prosopis glandulosa Torr.) was spreading into black grama [Bouteloua eriopoda (Torr.) Torr.] grassland”
e1“During the 45-year period mesquite attained complete dominance and many new mesquite dunes formed”
Claim · model-written summary
Black grama, relatively frequent in 1935, had completely disappeared by 1980 on both grazed and protected areas.
- Taxon
- Bouteloua eriopoda
Bouteloua eriopodae0 - Outcome
- frequencye2
- Qualifier
- completely disappeared by 1980e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“honey mesquite (Prosopis glandulosa Torr.) was spreading into black grama [Bouteloua eriopoda (Torr.) Torr.] grassland”
e2“Black grama had a relatively high frequency in 1935 but had completely disappeared by 1980, both on an area grazed by livestock and on an area protected from grazing”
Claim · model-written summary
Mesa dropseed increased in abundance, even during the 1950-1955 drought.
- Taxon
- Sporobolus flexuosus
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Sporobolus flexuosuse3 - Outcome
- abundancee3
- Direction
- increasede3
- Qualifier
- even during the drought period between 1950 and 1955e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e3“Mesa dropseed [Sporobolus flexuosus (Thurb.) Rydb.], fluffgrass [Erioneuron pulchellum (H.B.K.) Tateoka] and broom snakeweed [Xanthocephalum sarothrae (Pursh) Shinners] increased in abundance, even during the drought period between 1950 and 1955”
Claim · model-written summary
Fluffgrass increased in abundance, even during the 1950-1955 drought.
- Taxon
- Erioneuron pulchellum
Munroa pulchellae3 - Outcome
- abundancee3
- Direction
- increasede3
- Qualifier
- even during the drought period between 1950 and 1955e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Mesa dropseed [Sporobolus flexuosus (Thurb.) Rydb.], fluffgrass [Erioneuron pulchellum (H.B.K.) Tateoka] and broom snakeweed [Xanthocephalum sarothrae (Pursh) Shinners] increased in abundance, even during the drought period between 1950 and 1955”
Claim · model-written summary
Broom snakeweed increased in abundance, even during the 1950-1955 drought.
Verbatim
e3“Mesa dropseed [Sporobolus flexuosus (Thurb.) Rydb.], fluffgrass [Erioneuron pulchellum (H.B.K.) Tateoka] and broom snakeweed [Xanthocephalum sarothrae (Pursh) Shinners] increased in abundance, even during the drought period between 1950 and 1955”
Claim · model-written summary
Only 25% of the perennial forb species encountered in 1935-55 were found in 1980.
Verbatim
e4“Only 25% of the perennial forb species encountered in 1935-55 were found in 1980”