Emergence of Honey Mesquite Seedlings Relative to Planting Depth and Soil Temperature

Scifres, C. J.; Brock, J.

doi:10.2307/3897059

Cited by 22 publications

(10 citation statements)

References 2 publications

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“…As in P. glandulosa (Scifres and Brock 1972), caldkn germination is not regulated by light. The seed coat delays germination in caldkn because it interferes with water uptake.…”

Section: Germination Requirementsmentioning

confidence: 80%

Effects of Cattle Ingestion on Viability and Germination Rate of Calden (Prosopis Caldenia) Seeds

Peinetti¹,

Pereyra²,

Kin³

et al. 1993

Journal of Range Management

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Calden (Prosopis caldenia Burkart) is the dominant tree of the xerophytic open forest in the semiarid pampa of Argentina. Calden has gradually increased its distribution throughout the region during the past century as a result of livestock grazing in the pampa forest. Calden has an indehiscent legume fruit that is consumed by livestock during the February-April fruit shedding period (FSP). Both free seeds and pod segments (1 seed inside the endocarp) can be found in cattle dung. Free seeds and pod segments coming from fruits (uningested) and dung (excreted) were collected during the fruit shedding period on 22 February (Dl), 7 March (D2) and 27 March (D3) to compare viability and germination rate. Viabilities of uningested free seeds and pod segments averaged 95% and 65%, respectively, and were unaffected (p10.01) by date of collection. Excreted free seed from Dl was 37% viable, which was lower (EO.01) than the 72% viable for D2 and D3. Excreted pod segments averaged only 10% viable seeds. Ingestion Increased (p10.01) germination rate of free seed for Dl and D3. However, excreted seed displayed a range of delayed germination response. This diversity would increase the probability of seed germination for a variety of environmental and site conditions.

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“…As in P. glandulosa (Scifres and Brock 1972), caldkn germination is not regulated by light. The seed coat delays germination in caldkn because it interferes with water uptake.…”

Section: Germination Requirementsmentioning

confidence: 80%

Effects of Cattle Ingestion on Viability and Germination Rate of Calden (Prosopis Caldenia) Seeds

Peinetti¹,

Pereyra²,

Kin³

et al. 1993

Journal of Range Management

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“…1996), decrease (Günster 1994) or not affect (Figueiroa & Castro 2002; Otani 2004) germination compared with non‐ingested seeds. Furthermore, germination of P. juliflora is influenced by the semiarid climate of the Caatinga (Scifres & Brock 1972), where rainfall occurs over only two or three months. Rapid germination of this species may be promoted by scarification during passage through the ruminant gut (Vilela & Ravetta 2001).…”

Section: Discussionmentioning

confidence: 99%

Germination of Prosopis juliflora (Sw) DC seeds after scarification treatments

Miranda¹,

Oliveira²,

Correia³

et al. 2011

Plant Species Biology

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Invasive plant species are the second most important threat to global biodiversity loss after land-use change. Invasive species can modify native community composition, deplete species diversity and affect ecosystem processes. The Caatinga is one of the most human-affected Brazilian ecosystems owing to non-sustainable use of its natural resources. Prosopis juliflora is an important invasive plant species in the Caatinga ecosystem. Seed germination is a critical stage in plant life cycles and is a major factor in the establishment and success of invasive plant species. Among the factors that affect seed germination and dormancy, coat-imposed seems to be the most important for P. juliflora. In Prosopis species, the ingestion of fruits by wild and domestic animals may promote and accelerate germination, enhancing the dispersal of seeds and fruits of these species. We investigated the germination capacity of P. juliflora seeds after artificial mechanical and chemical scarification and analyzed the changes in seedling vigor caused by the scarification treatments. Germination rate, germination time (TMG) and germination synchrony (E) differed significantly with the length of the scarification treatments in H2SO4 for both seeds with endocarps and seeds without endocarps (non-endocarp seeds). Sulfuric acid affected plant survival more strongly than germination rate, particularly in non-endocarp seeds.

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“…Although extreme, this brief dry period did not have the profound effect on the crater populations felt by the prolonged 1940s-1960s drought, which was also regional in scope (Thomas 1962, Wahl and Larson 1970, Diaz and Quayle 1980 and severe enough to kill Prosopis in Texas (Carter 1964). As the shallow flood waters receded, miniature berms of organic debris and seeds would have been deposited, providing the requisite shallow burial for germination (Glendening and Paulsen 1955, Scifres and Brock 1970, 1972. Population changes featuring large pulses of establishment are shown by Prosopis.…”

Section: Discussionmentioning

confidence: 99%

“…Both storms produced temporary lakes in other craters of the region (Bull 197 4) and probably induced some ponding in MacDougal Crater. As the shallow flood waters receded, miniature berms of organic debris and seeds would have been deposited, providing the requisite shallow burial for germination (Glendening and Paulsen 1955, Scifres and Brock 1970, 1972. The large surge of establishment affecting this species and not Larrea is difficult to explain, but may have resulted from inadequate reserves in the seed bank of the latter species, the seeds of which are relatively short-lived (Boyd and Brum 1983) compared to Prosopis seeds, most of which remain viable through at least one winter-summer cycle following warm season seed ripening (Tschirley and Martin 1960).…”

Section: Discussionmentioning

confidence: 99%

Long‐Term Vegetation Change at a Fully Protected Sonoran Desert Site

Turner¹

1990

Ecology

185

141

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To investigate desert vegetation dynamics, I undertook an open-ended study of a site that offers a combination of multiple observations through time with continuous protection from domestic livestock and other human impacts. The site is MacDougal Crater in the Sierra del Pinacate Reserve, Sonora, Mexico. Three sources of data have been used: a s~ries of exactly matched photographs, begun in 1907; detailed permanent-plot maps, datmg from 1959-1960; and an age-distribution analysis of a 170-yr-old population of Carnegiea gigantea. The crater vegetation is dominated by the woody perennials Cercidium microphyllum, Encelia farinosa, Prosopis sp., and Larrea tridentata, and the columnar cactus Carnegiea gigantea. Various populations of Larrea tridentata declined 50-90%, and Cercidium declined 60%, during the first half of this century with little or no recruitment since. Carnegiea numbers increased fourfold over the same period. A 200-fold increase in Prosopis in the playa-like crater center occurred in the early 1970s. Elsewhere on the crater floor, Encelia density increased markedly during the same period from insignificant levels in the early 1960s. Age distribution analysis for the Carnegiea population reveals three major establishment peaks during the 1790-1960 period.Recruitment and mortality records from the three sources of data are compared with regional climate records. The high mortality for some of the species was probably the result of the prolonged drought during 1936-1964. Establishment surges for some appear related to periods of unusually heavy precipitation during certain seasons. Clearly, desert communities are highly responsive to changes in the climate regime under which they grow.

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Emergence of Honey Mesquite Seedlings Relative to Planting Depth and Soil Temperature

Cited by 22 publications

References 2 publications

Effects of Cattle Ingestion on Viability and Germination Rate of Calden (Prosopis Caldenia) Seeds

Effects of Cattle Ingestion on Viability and Germination Rate of Calden (Prosopis Caldenia) Seeds

Germination of Prosopis juliflora (Sw) DC seeds after scarification treatments

Long‐Term Vegetation Change at a Fully Protected Sonoran Desert Site

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